Question

Durga want to polish a circular table top of diameter 2.8 metre. Find the cost of polishing if the rate of polishing is ₹25 per square meter.

Answer 1

Diameter of table = 2.8 m

Radius of table (r) = 2.8/7 = 1.4 m

Area of table = πr²

= 22/7 x 1.4 x 1.4 = 22 x 0.2 x 1.4

= 4.4 x 1.4 = 6.16 sq. m

cost of polishing per sq.m = ₹25

6.16 per square meter polish a circular table cost = 25 x 6.16 = ₹154