13 buckets of water fill a tank when the capacity of each bucket is 51 litres. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 17 litres?
Choose the correct choice from the following answers:  A) 39  B) 28  C) 23  D) 12  E) 24

Rationale: "capacity of the tank = ( 13 × 51 ) litre number of buckets required of capacity of each bucket is 17 litre = 13 × 51 / 17 = 13 × 3 = 39 answer is a"
Answer: A