Ques:- There is a 50m long army platoon marching ahead. The last person in the platoon wants to give a letter to the first person leading the platoon. So while the platoon is marching he runs ahead, reaches the first person and hands over the letter to him and without stopping he runs and comes back to his original position. In the mean time the whole platoon has moved ahead by 50m. The question is how much distance did the last person cover in that time. Assuming that he ran the whole distance with uniform speed.
Recent Answer : Added by Admin On 2020-05-17 12:00:37:
The last person covered 120.71 meters.
It is given that the platoon and the last person moved with
uniform speed. Also, they both moved for the identical
amount of time. Hence, the ratio of the distance they
covered – while person moving forward and backword – are
equal.
Let’s assume that when the last person reached the first
person, the platoon moved X meters forward.
Thus, while moving forward the last person moved (50+X)
meters whereas the platoon moved X meters.
Similarly, while moving back the last person moved [50-(50-
X)] X meters whereas the platoon moved (50-X) meters.
Now, as the ratios are equal,
(50+X)/X = X/(50-X)
(50+X)*(50-X) = X*X
Solving, X=35.355 meters
Thus, total distance covered by the last person
= (50+X) + X
= 2*X + 50
= 2*(35.355) + 50
= 120.71 meters
Note that at first glance, one might think that the total
distance covered by the last person is 100 meters, as he
ran the total lenght of the platoon (50 meters) twice.
TRUE, but that’s the relative distance covered by the last
person i.e. assuming that the platoon is stationary.
Ques:- Present ages of X and Y are in the ratio 5:6 respectively. Seven years hence this ratio will become 6:7 respectively. What is X’s present age in years?
Recent Answer : Added by shivangi sharma On 2022-08-14 16:42:35:
the ratio of present age of x:y is 5:6
And,we have to find the present age of x.
so,the present age of X is definitely will be multiple of 5.
X=35
so,35 is the answer.
Ques:- Are you applying for other jobs? Do you have any other offer in hand?
Ques:- You are given with two identical iron bars. one of them is magnetized and the other is not. u are suppose to find which one is magnetized. u are not suppose to use any other thing.
Ques:- How would you build a test team?
Ques:- Why do you not join your family business
Ques:- What is your work experience in computer?
Ques:- Field experience, team handling skill, team players role, last jobs experience,job change reason.
Ques:- A man has age in years equal to his daughters age in months and daughter age is equals to his grand daughter age in weeks and her age in weeks total age of 3 members is given 91.find out the mans age
Ques:- A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. What is the length of the train?
Recent Answer : Added by megha On 2022-11-24 16:55:33:
150m
Ques:- Axman travels 7 km towards south and then 5 km towards his left. He further travels 5 km towards south. How far is he from the starting point?
Ques:- area of triangle=1/2*b*h base incresed by 4 times & height is devided by 2, the net effect of area
Recent Answer : Added by Admin On 2020-05-17 11:59:59:
X = 1/2 * b*h
base incresed by 4 times & height
is devided by 2
X = 1/2 * 4b * h/2
X = h/4 * 4b
X = hb
Ques:- From 5 litres of a 20% solution of alcohol in water, 2 litres of solution is taken out and 2 litres of water is added to it. Find the strength of alcohol in the news solution.
A. 10%
B. 12%
C. 15%
D. 18%
Recent Answer : Added by Mohammad On 2022-11-18 16:03:05:
In 5liter alchol is 20%
In 1liter alchol is0.2÷5=0.04liter
Taken out 2liter solution =3liter solution
Alchol present 3×0.04=0.12liter
7liter water alhol present=0.12liter
12%
Ques:- What is the difference between bpo and call centre?
Ques:- Who invented the Bikim?
A. Louis Reard
B. Samuel Reard
C. Nina Ricci
D. Joseph Lean
Ques:- Members in the family
Ques:- The ratio fo Boys to Girls is 6:4. 60% of the boys and 40% of girls take lunch in the canteen. What % of class takes lunch in canteen.
Recent Answer : Added by vivin On 2022-03-09 16:46:02:
assume the ratio 6:4 to be 60:40
boys taking lunch in canteen=60% of 60=36
Girls taking lunch in the canteen=40% of 40=16
Total boys and girls taking lunch in the canteen=52
Total students we assumed is 60+40=100
Therefore percentage of boys and girls taking lunch in the canteen=(52/100)*100=52%
Ques:- Five friends M, K, T, P and N are sitting around a circlefacing towards the center. K is sitting between M and P. Nis to the immediate right of M. Who is to the immediateright of T?
Recent Answer : Added by Admin On 2020-05-17 12:03:40:
( b ) P
Ques:- A store owner is packing small radios into larger boxes that measure 25 in. by 42 in. by 60 in. If the measurement of each radio is 7 in. by 6 in. by 5 in., then how many radios can be placed in the box?
Ques:- Family background and how many people of my family etc
Ques:- Knowledge gained in overall job experience
Ques:- Why should i take you ?
Ques:- Full name of aanahazara
Recent Answer : Added by Hemant Verma On 2021-08-16 03:57:58:
Kisan Baburao Hazare
Ques:- 10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.
Recent Answer : Added by Mahomed On 2021-08-24 15:05:46:
All books can be arranged in 10! ways. A single pair of books can be taken as a unit and arranged among the 8 others in 9! ways. The pair of books can also be interchanged and therefore rearranged in 2! ways. Thus the probability of the pair always being together is (9!*2!)/10!
Ques:- During a given week a programmer spend 1/4 of his time preparing charts,3/8 of his time for coding,rest of his time for debugging the programs.If he had 48 hrs during the week how many hours did he spend debugging the program
Ques:- A person can row at 9 kmph and still water. He takes 4 1/2 hours to row from A to B and back. What is the distance between A and B if the speed of the stream is 1 kmph?
Ques:- A man’s speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. What is the man’s speed against the current?
Ques:- What is the main role of HR in an organization?
Ques:- P and Q invests Rs.10000 each, P investing for 8 months and Q investing for all the 12 months in the year. If the total profit at the end of the year is Rs.25000, find their shares?
Recent Answer : Added by Singaram On 2021-09-03 16:38:57:
10000*8:10000*12
2:3
5x=25000
x=5000
p:q
10000:15000
Ques:- A son and father goes for boating in river upstream . After rowing for 1 mile son notices the hat of his father falling in the river. After 5 min. he tells his father that his hat has fallen. So they turn around and are able to pick the hat at the point from where they began boating after 5 min. Find out the speed of river.
Recent Answer : Added by Admin On 2020-05-17 11:59:48:
6 miles per hour…….
actually hat fell when they were 1 mile away from starting
and total time hat takes to travel to the starting point is
10 minutes ( 5 + 5 ).so, 1 miles per 10 minutes thats why 6
miles per hour
The last person covered 120.71 meters.
It is given that the platoon and the last person moved with
uniform speed. Also, they both moved for the identical
amount of time. Hence, the ratio of the distance they
covered – while person moving forward and backword – are
equal.
Let’s assume that when the last person reached the first
person, the platoon moved X meters forward.
Thus, while moving forward the last person moved (50+X)
meters whereas the platoon moved X meters.
Similarly, while moving back the last person moved [50-(50-
X)] X meters whereas the platoon moved (50-X) meters.
Now, as the ratios are equal,
(50+X)/X = X/(50-X)
(50+X)*(50-X) = X*X
Solving, X=35.355 meters
Thus, total distance covered by the last person
= (50+X) + X
= 2*X + 50
= 2*(35.355) + 50
= 120.71 meters
Note that at first glance, one might think that the total
distance covered by the last person is 100 meters, as he
ran the total lenght of the platoon (50 meters) twice.
TRUE, but that’s the relative distance covered by the last
person i.e. assuming that the platoon is stationary.