Question

A well of diameter 150cm has a 30cm wide parapet running around it. Find the area of the parapet.​

Answer 1

hey mate here's ur answer....

Step-by-step explanation:

Given diameter = 150cm. 

Then the radius will be r = d/2

                                         = 75 cm.

Given width = 30cm.

Outer radius of the parapet R = 75 + 30

                                                  = 105 cm.

The area of the parapet = pi(R^2 - r^2)

                                         = pi((105)^2 - (75)^2)

                                         = 22/7 * (11025 - 5625)

                                          = 22/7 * 5400

                                          = 16971.428 cm^2.

Hope this helps!

mark as brainliest..