If the length of a lake is 40 m and breadth is 10 m. Lake contains 1200 cubic metre of water, then depth of lake is

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Mathematics : Math Misc

If the length of a lake is 40 m and breadth is 10 m. Lake contains 1200 cubic metre of water, then depth of lake is

A. 4m

B. 3.5m

C. 3m

D. 4.5m

Solution

C. 3m

Explanation

let the depth of the lake be x m.
Therefore,

Thus, depth of the take is 3 m.