There is a leak in the bottom of a cistern. When the cistern
is thoroughly repaired, it would be filled in 3 ? hours. It
now takes half an hour longer. If the cistern is full, how
long will the leak take to empty the cistern?
(a) 24 hours
(b) 28 hours
(c) 21 hours
(d) 27 hours
(e) None of these
Answer Posted / mohit
suppose the capacity of cistern is 30unit. when it id repaired
then takes 3 hrs.thus water coming in i hrs=10unit.
now leak tank takes 3 hrs and 1/2 hrs extra. that is, in
general think that the water filling in 1/2 hrs is equal to
the leakage of hole in 3.5 hrs.
leakage in 3.5 hrs is =10/2=5 unit
so 5 unit is leakad in =3.5 hrs
so 30unit(full capacity) is leaked in =3.5*30/5
=21 hrs
so it will take 21 hrs to empty the full cistern.
| Is This Answer Correct ? | 25 Yes | 16 No |
Post New Answer View All Answers
X2 – (A-3)X +(A+3) = 0 for what value of A the sum of square of roots will be least ?
A building with hight D ft shadow upto G A neighbour building with what height shadow C ft is?
There are 40 seats in a bus. People agree to share the money for the number of seats. The total money comes to 70.37. How many seats were free?
In a arithmetic reason 10,9,60,90,70 and 66.. .whats the next number with conclusion
There are 3 societies A,B,C having some tractors each. A Gives B and C as many tractors as they already have. After some days B gives A and C as many tractors as they have. After some days C gives A and B as many tractors as they have. Finally each has 24 tractors.what is the original No.of tractors each had in the beginning?
one grandfather has three grandchildren, two of their age difference is 3, eldest child age is 3 times youngest child’s age and eldest child’s age is two times of sum of other two children. What is the age of eldest child?
One day the Finance minister decides that the country should have only 33 paise and 56 paise.If there are two traders having enough change in the two denominations, what is the minimum amount for which they can transact?
If A=Z, B=Y, C=X, .......... Z=A, Then LIMIT = ?
If A/B = 6/5,then 3A+2B =
Work can be done by 8 men and 10 women in 25 days, the same work can be done by 10 children and 5 women . in how many days 2 children and 3 men can do the work?
a number of subsets of a set s is 128, then s has
If A = x3y2x3y2 and B=xy3xy3, then find the HCF of A, B
vernacular : place : : fingerprint : ?
Find the nth number in the series is 1, -3, 5, -7.___
Find the number WXYZ divisible by 36? i) Let the digits be5, 4,3,6 -not in that order ii) Sum of last two digits is 9 iii) Sum of middle two digits is 7->If one is sufficient then ans as A || if two is sufficient then ans as B || if all are necessary then ans as C || if nothing is needed then