A car has two wipers which do not overlap. Each wiper has a blade of length r cm sweeping through an angle of 120°. The total area cleaned at each sweep of the blade is:
(a) 1/3πr
(b) 2/3πr
(c) 1/3πr²
(d) 2/3πr²
Answers
Answered by
0
Answer:
Total area cleaned by 2 wipers
=2× area cleaned by 1 wiper
=2× area of sector with 115
∘
=2×
360
∘
θ
×πr
2
=2×
360
∘
115
∘
×
7
22
×25
2
Therefore area cleaned by wipers =
126
158125
cm
2
=1254.96
Similar questions