Q. 3

# A car has two wipers which do not overlap. Each wiper has a blade of length 25 cm. sweeping through an angle of 115^{o}. Find the total area cleaned at each sweep of the blades.

(use π = 22/7)

Answer :

Radius = 25cm

Angle = 115°

Area of sector ACD = 627.22cm2

For 2 such wipers: 2 × 627.22

Area = 1254.45 cm2

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PREVIOUSA chord of a circle of radius 12 cm. subtends an angle of 120o at the centre. Find the area of the corresponding minor segment of the circle(use π = 3.14 and √3 = 1.732)NEXTFind the area of the shaded region in figure, where ABCD is a square of side 10 cm. and semicircles are drawn with each side of the square as diameter(use π = 3.14)

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