Question

The number of revolutions a wheel of diameter  40 cm makes in travelling a distance of 176 m , is


Options:
A .  140
B .  150
C .  160
D .  166
Answer: Option A

Distance covered in 1 revolution  = `2 pi R = ( 2 xx 22/7 xx 20) cm = 880/7` cm

Required number of revolutions =` (17600 xx 7/880) ` = 140



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