The diameter of a circular well is 4.5 m and its depth is 7 m. Find the cost of cementing the inner curved surface of the well at the rate of rupees 3.50 per m^2.
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Step-by-step explanation:
curved surface are is 2*22/7*r*h.
=2*22/7*4.5/2*7
=2*22/7*2.25*7
=44*2.25
=99 m2
rate of cemanting is rs3.50/m2
1m2=3.50
99 m2=3.50*99=rs 346.5
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