Question

Find the cost of plastering the inner surface of a well at
9.50 per m², if it
is 21 m deep and diameter of its top is 6 m.
​

Answer 1

Answer:

inner ( curved) surface area of well(cylinder)=

2πrh

=2×22/7×3×21

396m^2

cost of 1m^2= 9.5RS

cost of 396m^2= 9.5 ×396

= 3762 RS

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