Question

Area of a cover of a well of diameter 100 is...​

Answer 1

Answer:

diameter=2×radius

radius=diameter/2.....

if diameter -100 then

radius=100÷2=50

area or circle =area of a cover of a well

formula of area of circle=π×r×r {π22/7=3.14}

so area of circle... if r=50

area=22/7×50×50

=3.14×2500=7850²

Answer 2

Area of a cover of a well of diameter 100 is 2500π

Step-by-step explanation:

A well of diameter 100. Top of well is circular.

Area required to cover the top is equal to area of circle whose diameter 100.

Radius is half of diameter.

$r=\dfrac{d}{2}$

where, d = 100

$r=\dfrac{100}{2}$

$r=50$

Area of circle, $A=\pi r^2$

$A=\pi \times (50)^2$

$A=2500\pi$

Hence, area of a cover is $2500\pi$

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Area of circle

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