12 buckets of water fill a tank when the capacity of each tank is 13.5 litres. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 9 litres?	Select the correct option.
A) 8
B) 15
C) 16
D) 18
E) None
Solution   Capacity of the tank	= (12×13.5) litres   = 162 litres.   Capacity of each bucket	= 9 litres.   Number of buckets needed	= (162/9)= 
<gadget id="calculator">(162/9)</gadget>
<output>18</output>
› 18.   Answer 18
<result>D</result>
12 buckets of water fill a tank when the capacity of each tank is 13.5 litres. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 9 litres?