the cost of polishing the top of a circular table of radius 2.1 metre at the rate of 10 rupees per square metre is how much
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Step-by-step explanation:
Radius of circle= 2.1 metre
Area of circle= πr²
= 22/7×21/10×21/10
= 13.86m²
Cost of polishing= ₹10/m²
total cost= ₹10×13.86
= ₹138.6 Ans
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