A rectangular field 30 m long and 20 m broad. How much deep it should be dug so

Question

A rectangular field 30 m long and 20 m broad. How much deep it should be dug so that from the earth taken out, a platform can be formed which is 8 m long, 5.5 m broad and 1.5 m high where as the earth taken out is increase by 10/5?

Options:

A . 12 cm

B . 10 cm

C . 18 cm

D . 24 cm

Answer: Option B

30 * 20 * x = (8 * 5.5 * 1.5)/2

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