Ques:- Find the average of the series : 312, 162, 132, 142 and 122?
Recent Answer : Added by L.Lalitha priya On 2022-05-17 08:56:37:
Sum of all numbers in series= 870 (I.e 312+162+132+142+122)
Average=sum of numbers/count of numbers
Average= 870/5
= 174
Ques:- A train 240 m long passed a pole in 24 sec. How long will it take to pass a platform 650 m long?
Recent Answer : Added by dumeel kuppam vavvaalu On 2021-08-25 14:15:33:
From the first statement
Speed=distance/time
=>240/24=10m/s
so speed=10m/s
From the second statement
distance=length of the platform+length of the train=650+240=890m
Time=distance/speed
here, the speed of the train is already calculated
=>890/10=89s
So the time taken by the train to cross the platform is 89 seconds
Ques:- What is the present worth of Rs. 132 due in 2 years at 5% simple interest per annum?
Recent Answer : Added by WebApp Tester On 2022-04-02 06:59:18:
145.2
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Ques:- 27(deg) 6' 43.15"
45(deg) 31' 4.3"
THEN WHAT WILL BE THE DEGREE WHEN TIME IS 3 O CLOCK
Recent Answer : Added by 9074743593 On 2021-07-29 16:19:44:
90 degree
Ques:- ‘School’ is related to ‘Education’ in the same way as ‘Hospital’ is related to
Recent Answer : Added by Admin On 2020-05-17 12:03:35:
( a ) Treatment
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Ques:- 97 : 89 :: 43 : __
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Ques:- When x is real what is the least value of (x**2-6*x+5)/(x**2+2*x+1)
Recent Answer : Added by Admin On 2020-05-17 12:01:23:
(x**2 – 6* x + 5) = (x-1)*(x-5)
(x**2 + 2 * x + 1) = (x + 1) * (x+1) = (x+1)**2
For what x is (x-1)*(x-5)/( (x+1)**2) a minimum?
One way to answer this question is by using calculus.
Take the derivative, and set to zero.
Since this is a fraction of polynomials, and a fraction is
zero only if it’s numerator is zero, we need calculate only
the numerator of the derivative and set it to zero.
The numerator of the
Derivative of (x-1)*(x-5)/( (x+1)**2) is
( (x-1) + (x-5) ) ( x+1)**2 – (x-1)(x-5)( 2 (x+1) )
= (2 x – 6) (x+1)**2 – (2) (x-1)(x-5) (x+1)
= 0
Divide through by 2 (x+1)
(x-3)(x+1) – (x-1)(x-5) = 0
(x**2 – 2 x – 3 ) – (x**2 – 6 x + 5) = 0
x**2 – x**2 – 2 x + 6 x – 3 – 5 = 0
4 x – 8 = 0
x = 2
Plugging in x = 2 into the original
(x**2-6*x+5)/(x**2+2*x+1)
gives us (2**2 – 6 * 2 + 5)/(2**2 + 2*2 + 1)
= (4 – 12 + 5) / (4 + 4 + 1) = -3/9 = -1/3
Least value is -1/3
Ques:- Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would take taken 6 hours more than A fill the cistern. How much time will be taken by A to fill the cistern separately?
Recent Answer : Added by Vemula Rohan Kumar Reddy On 2021-09-25 16:19:51:
A takes 6 hours to fill
Ques:- There are 18 stations between Hyderabad and Bangalore. How many second class tickets have to be printed, so that a passenger can travel from any station to any other station?
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Ques:- A train 132 m long passes a telegraph pole in 6 seconds. Find the speed of the train
A. 70 km/hr
B. 71 km/hr
C. 72 km/hr
D. 79.2 km/hr
Recent Answer : Added by ABC On 2022-09-15 16:37:12:
79.2
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Ques:- A circular path of 13 m radius has marginal walk 2 m wide all round it. Find the cost of leveling the walk at 25p per m2?
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Ques:- The length of the rectangular field is double its width. Inside the field there is square shaped pond 8m long. If the area of the pond is 1/8 of the area of the field. What is the length of the field?
Recent Answer : Added by ramathota madhu On 2022-03-09 16:36:28:
w, l=2w , area of square =8^2 = 64
area of rectangle = l*b
so w*2w = 8*64
w=16
length = 32
225