30 buckets of water fill a tank when the capacity of each bucket is 13.5 litres. How many buckets will be required to fill the same tank if the capacity of each bucket is 9 litres?	Choose the correct choice.
A) 30	B) 32	C) 45	D) data inadequate	E) none of these

Rationale: "capacity of the tank = 30 ã — 13.5 = 405 litres when the capacity of each bucket = 9 litres , then the required no . of buckets = 405 â  „ 9 = 45 answer c"
Answer: C