Question

find the cost of polishing a circular table top of diameter 1.6 M if the rate of polishing is rupees 15 m square take Pi 3.14 .​

Answer 1

30.144 or 3.14 if rounded.

Explanation:

First you need to find the area of the table top

a =
`\pi r^(2)`

a = (3.14) (
`.8^(2)`) The radius is the half of the diameter 1.6/2 = .8

a = 3.14(.64)

a = 2.0096

The area is 2.0096
`m^(2)`

the cost will be

2.0096 x 15 = 30.144 rupees

Doe you round rupees to the nearest hundredths' place? I am not sure. Rounded the number would be 30.14