Simplification - General Aptitude

Q1:

To fill a tank, 25 buckets of water is required. How many buckets of water will be required to fill the same tank if the capacity of the bucket is reduced to two-fifth of its present ?

A 10

B 35

C 62.5

D Cannot be determined

E None of these

ANS:C - 62.5

Let the capacity of 1 bucket = x. Then, the capacity of tank = 25x.

New capacity of bucket = 2 x
5
 Required number of buckets = 25x
(2x/5)
=  25x x 5
2x
= 125
2
= 62.5