Question

a circular well of depth 7m is 1.5 m is dug calculate the cost of the cement in the inner surface at the rate of rupees 5 per square metre

Answer 1

Answer:

Rs. 330

Step-by-step explanation:

Given → height of well = 7m ; radius = 1.5m.

To find inner surface → Cost to cementing inner sur Solution → Surface surface area. area area. of inner surface = curoved

:. Area = 2πrh

2 x 22 x 7 x 1.5 7

66 m².

Cost = = €5 per sq m.

:: Total cost = 66 x 5

₹330

Hence cost of cementing inner surface is ₹330.

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