a) 8
b) 15
c) 16
d) 18
Answer: d
Explanation: Capacity of the tank
= (12 × 13.5) litres
= 162 litres
Capacity of each bucket = 9 litres
Number of buckets needed
$$\eqalign{
& {\text{= }}\left( {\frac{{162}}{9}} \right) \cr
& = 18 \cr} $$
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