Ques:- There are two candles of equal lengths and of different thickness. The thicker one lasts of six hours. The thinner 2 hours less than the thicker one. Ramesh lights the two candles at the same time. When he went to bed he saw the thicker one is twice the length of the thinner one. How long ago did Ramesh light the two candles .
Recent Answer : Added by narendra On 2021-12-25 15:45:32:
let x be lenghth of candles.
thicker one—- in 1 hr 1/6th will go.
thinner one— in 1 hr 1/4th will go.
let he lit for n hrs.
so in n hrs thicker one goes n/6.
and thinner one goes n/4.
so remainini length are x-n/6 and x-n/4.so x-n/6=2(x-n/4)
implie n=3x. if x=1 n=3hrs.
Ques:- If 12 men do a work in 80 days, in how many days will 16 men do it?
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 12:00:14:
area is doubled.
actual area = 1/2 bh
after increase area = 1/2 *4b* h /2
=bh
1/2 *bh *2 = bh
therefore area is doubled
Ques:- A football team played 60 matches out of which 30% were won by them. If they start winning all the next matches after how many matches will the average winning rate be 50% ?
Recent Answer : Added by Suman On 2021-10-07 15:41:23:
Matches played: 60.
Matches won: 30% of 60 => (60*(30/100)) = 18 matches.
Iterative approach:
On adding 1 to matches played and matches won, on every iteration until the win percentage gets to 50. So
19 / 61 = 0.3114754098360656
20 / 62 = 0.3225806451612903
21 / 63 = 0.3333333333333333
22 / 64 = 0.34375
…
…
…
…
Similarly,
41 / 83 = 0.4939759036144578
42 / 84 = 0.5
So, after 60th match 24 more matches has to be played and won to get 50% average winning rate.
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Ques:- Design an elevator system for a 100 story building. Address all issues, like number of elevators, speed of each (Not numerically), waiting times etc. There would be 100-200 people living/working on each floor.
Ques:- Suppose you have to measure from 1 to N kg weight through weighing Machine.How many min. different weight are required to measure all weight?
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Ques:- Functionalties of servlets.
Recent Answer : Added by MGK On 2021-08-06 04:58:03:
Servlets are the Java programs that run on the Java-enabled web server or application server. They are used to handle the request obtained from the webserver, process the request, produce the response, then send the response back to the webserver.
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Ques:- Suppose a clock takes 7 seconds to strike 7. How long will it take to strike 10?
Ques:- Four persons have to cross the bridge they are having one torch light. Four persons take 1,2,5,10 minutes respectively, when two persons are going they will take the time of the slowest person. What is the time taken to cross by all of them.
Recent Answer : Added by Jamila On 2022-08-14 16:36:05:
10 minutes
Ques:- Walking 7/6 of his usual rate, a boy reaches his school 4 min early. Find his usual time to reach the school?
Recent Answer : Added by Admin On 2022-09-29 17:15:23:
Speed Ratio = 1:7/6 = 6:7
Time Ratio = 7:6
1 ——– 7
4 ——— ? 28 m
Ques:- Two people X & Y walk on the wall of a godown in opposite direction. They meet at a point on one side and then go ahead. X after walking for some time, walks in opposite direction for 15 mtrs.Then again he turns back and walks in the original direction. What distance did Y walk before they met again, if X walks 11 mtrs by the time Y walks
Recent Answer : Added by Admin On 2020-05-17 11:59:43:
i Guess 8 mtrs.
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Ques:- By selling a product a seller is gaining 10% on selling price. If he sell that product Rs.80 less, he would have been losing 10%. What is the cost price?
Recent Answer : Added by Vandan Atha On 2021-10-07 15:41:14:
72
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Ques:- If the length of the train is 100m and its speed is 60km/h and another length of the train is 80km and its speed is 50km then its travelling in opposite direction. Find out the time of crossing each other(m/s)?
Recent Answer : Added by Syed Faizan On 2021-12-13 17:58:35:
43.69
Because the total distance will be =100+80000m=80100m. Thus two train coming towards, so the speed will be increase. speed will be =60+50=110km/h, The time of crossing will be 43.69 minutes.
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Ques:- A and B can do a work in 5 days and 10 days respectively. A starts the work and B joins him after 2 days. In how many days can they complete the remaining work?
Recent Answer : Added by Faizan On 2022-08-14 16:28:54:
let x be lenghth of candles.
thicker one—- in 1 hr 1/6th will go.
thinner one— in 1 hr 1/4th will go.
let he lit for n hrs.
so in n hrs thicker one goes n/6.
and thinner one goes n/4.
so remainini length are x-n/6 and x-n/4.so x-n/6=2(x-n/4)
implie n=3x. if x=1 n=3hrs.