Question

A car has two wipers do not overlap each wiper has a blade of length 20 cm sweeping through an angle of 135 ° find the total area cleaned in each sweep of blades

Answer 1

Answer:

942.46 cm^2

Step-by-step explanation:

Since there are two wipers

So the the are cleaned will be twice the area cleaned by one wiper

Area cleaned by one wiper:

r=20 cm

So area cleaned by wiper= area of sector

Area of sector= pi*r^2*(theta)/360

= 3.14*400*135/360

=471.23(approx)

Total area cleaned = 471.23*2 .......(as there’re two wipers)

=942.46cm^2(approx)

Hope it helps