Question

find the cost of polishing a circular table -top of diameter 1.8m, if the rate of polishing is ₹ 14 sq.m
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Answer 1

Answer:

diameter = 1.8 m

Radius = diameter/2

= 1.8/2 m

= 0.9 m

Area of circle = π r²

= 22/7 * 0.9m * 0.9 m

= 1782/7 m²

Cost of polishing 1m²= 14m²

Therefore

Cost of polishing 1782/7 m² = 1728/7 * 14

= Rs 3564

Answer 2

To find the cost of polishing, first v need to find the area of the table.

Diameter= 1.8

Radius= Diameter/ 2= 1.8/2 = 0.9

Area= πr²

Area= 3.14×0.9×0.9

= 2.5424m²

Cost of polishing= Rate× Area

= 14×2.5424

Rs.35.5936

KEEP SMILING!!