Question

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

Answer 1

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Answer 2

The area of the parapet is 16971.42 cm².

Step-by-step explanation:

Given : A well of diameter 150 cm has a 30 cm wide parapet running around it.

To find : The area of the parapet ?

Solution :

A well of diameter 150 cm.

The radius of the diameter is $r=\frac{d}{2}$

$r=\frac{150}{2}=75$

A 30 cm wide parapet running around it.

Outer radius of the parapet is R=75+30=105 cm

The area of the parapet is given by,

$A=\pi (R^2-r^2)$

Substitute the values,

$A=\frac{22}{7}(105^2-75^2)$

$A=\frac{22}{7}(11025 - 5625)$

$A=\frac{22}{7}\times 5400$

$A=16971.42$

Therefore, the area of the parapet is 16971.42 cm².

#Learn more

A well of diameter 150 cm has a stone parapet around it. If the length of the outer edge of the parapet is 616 cm find the weight of the parapet

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