Question

A landing pad for a helicopter is in the shape of a circle with a radius of 7 meters. Which of the following is closest to the area of the landing pad?

Answer 1

Area of Circular landing pad = 307.72 m^2

Explanation:

Area of Circular landing pad = 2πr^2

where r = radius of circular landing pad = 7m

π = 22/7 = 3.14

by placing all these value in the formula

Area of Circular landing pad = 2*3.14*(7^2)

Area of Circular landing pad = 6.28*49

Area of Circular landing pad = 307.72 m^2

Answer 2

The approximate value of the area is
`153.86\ m^(2)`

Explanation:

we know that

The area of the circle (landing pad) is equal to

`A=\pi r^(2)`

we have

`r=7\ m`

substitute

`A=\pi (7)^(2)`

`A=49\pi\ m^(2)` ----> exact value of the area

Find the approximate value

assume
`\pi=3.14`

`A=49(3.14)=153.86\ m^(2)` ------> approximate value of the area