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The no of revolutions a wheel of diameter 40cm makes in traveling a distance of 176m is

240
140
40
340

Correct Answer: 140

Explanation:

distance covered in 1 revolution = $2 πr$ = 2 x (22/7) x 20 = 880/7 cm
required no of revolutions = 17600 x (7/880) = 140

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