Find the cost of polishing a circular table top of diameter 14 m, if the rate of polishing is Rs. 15 per square metre.
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Step-by-step explanation:
area of circular top= πr*2
= 22/7 x 14/2 x 14/2
= 22/7 x 7 x7
= 22x7
= 154m*2
cost of polishing = 154x15 = 2310 rs
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We need to find the area of the table top.
Area of Circular table top = πr²
(Diameter = 14, Radius = 7)
= 22/7 × 7 × 7
= 22 × 7
= 154 m²
Cost of Polishing @Rs. 15/ m²
= 154 × 15
= Rs. 2310
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