Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is Rs 15/m^2.
Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is Rs 15/m2. [Use π =3.14]
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Diameter of the circular table top = 1.6 m
\Radius of the circular table top =1.6/2 =0.8
Area of circular table top = π r 2
= 3.14 x 0.8 x 0.8 = 2.0096 m2
Now cost of 1 m2 polishing = Rs 15
Then cost of 2.0096 m2 polishing = 15 x 2.0096 = Rs 30.14 (approx.) Thus, the cost of polishing a circular table top is Rs 30.14 (approx.)
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