Question

An engineer is planning a new water pipe installation. The circular pipe has a diameter of d=20 cm
What is the area A of the circular cross section of this pipe?

Answer 1

Pls find the attached file for ur reference.

Answer 2

Area of the circular cross section of this pipe is 314 sq cm

Solution:

Given that,

An engineer is planning a new water pipe installation

The circular pipe has a diameter of d=20 cm

To find: Area of the circular cross section of this pipe

From given,

$d = 20\ cm\\\\r = \frac{20}{2} = 10\ cm$

Thus,

$Area\ of\ circiular\ cross\ section = \pi r^2\\\\Area\ of\ circiular\ cross\ section = 3.14 \times 10^2\\\\Area\ of\ circiular\ cross\ section = 3.14 \times 100\\\\Area\ of\ circiular\ cross\ section = 314\ cm^2$

Thus, area A of the circular cross section of this pipe is 314 square cm

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