Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is Rs 15/m2. (Take π = 3.14)
Diameter = 1.6 m
Radius
=
0.8 m
Area = 3.14 × 0.8 × 0.8
= 2.0096 m2
Cost for polishing 1 m2 area = Rs 15
Cost for polishing 2.0096 m2 area = 15 × 2.0096 = 30.14
Therefore, it will cost Rs 30.14 for polishing such circular table.