A rectangular water reservoir contains 42000 litres of water. If the length of reservoir is 6 m and breadth of the reservoir is 3.5 m, then the depth of the reservoir will be :
Options:
A . 2 m
B . 5 m
C . 6 m
D . 8 m
Answer: Option A Volume of the reservoir = 42000 litres = 42 m3 Let the depth of the reservoir be h metres then, $$\eqalign{ & 6 \times 3.5 \times h = 42 \cr & Or,\,h = \frac{{42}}{{6 \times 3.5}} = 2\,m \cr} $$
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