The inner diameter of a well is 4.20 metre and its depth is 10 metre. Find the inner surface area of the well. Find the cost of plastering it from inside at the rate Rs.52 per sq.m.

The inner diameter of a well is 4.20 metre and its depth is 10 metre.

1.	The inner diameter of a well is 4.20 metre and its depth is 10 metre. Find the inner surface area of the well. Find the cost of plastering it from inside at the rate Rs.52 per sq.m.
Answer» By APPLYING FORMULA $2\pi \times 2.1 \times 10 + 2\pi \times 2.1 {}^{2}$ SURFACE area=159.65 for COST =159.65×52=8302.09

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The inner diameter of a well is 4.20 metre and its depth is 10 metre. Find the inner surface area of the well. Find the cost of plastering it from inside at the rate Rs.52 per sq.m.

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