Question

find the cost of polishing the top of a circular table of diameter 4.2m if the rate of polishing is rup 12per sq. m

Answer 1

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Answer 2

Given :

The rate of polishing is rup 12per sq. m

To Find :

Find the cost of polishing the top of a circular table of diameter 4.2m if the rate of polishing is rup 12per sq. m

Solution:

Diameter of circular table = 4.2 m

Radius of circular table = $\frac{4.2}{2}=2.1 m$

Area of circular table =$\pi r^2 = \frac{22}{7} \times 2.1^2 =13.86 m^2$

Cost of polishing 1 sq.m. = Rs.12

Cost of polishing 13.86 sq.m. = 12 \times 13.86=166.32

Hence the cost of polishing the top of a circular table of diameter 4.2 m is Rs.166.32