12 buckets of water fill a tank when the capacity of each bucket is 13.5 litres. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 9 litres?
(a)8
(b)15
(c)16
(d)18
Answer
Answer (as printed): D
Explanation
Capacity of the tank = (13.5 × 12) litres = 162 litres. Required number of buckets = $\frac{162}{9}$ = 18.
Explanation as extracted from the printed page; notation may be imperfect.