Question

a windscreen wiper of a vehicle of length 30 cm clears out an angle of 180 degrees what is the area of the screen cleared take pie=22/7​

Answer 1

Therefore the area of the screen cleared is 1414.28 cm².

Explanation:

Given:

a windscreen wiper of a vehicle of length 30 cm

Consider this length as Radius of Semicircle, r = 30 cm

clears out an angle of 180 degrees implies Semicircle Shape

pie=22/7

To Find:

Area of the screen cleared ​

= ?

Solution:

We have

`\textrm{Area of Semicircle}=(1)/(2)\pi(radius)^(2)`

Substituting r and pie we get

`\textrm{Area of Semicircle}=(1)/(2)* (22)/(7)(30)^(2)=1414.28\ cm^(2)`

Therefore the area of the screen cleared is 1414.28 cm².