Find the cost of polishing a circular tabletop of
diameter 2.8 m, if the rate of polishing is 7100/m2.
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Answer:
Area of a circle
A = πr² [r = 2.8/2 = 1.4]
= 3.14 x 1.4²
= 6.1544m²
Therefore, if 1m² costs ₹7,100
6.1544m² costs ₹7,100 x 6.1544
= ₹43,696.24
Therefore, cost of polishing a circular tabletop of
diameter 2.8 m is ₹43,696.24.
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