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Q.

Two gear wheels which are meshed together have radii 0.5cm and 0.15cm. The number of revolutions made by the smaller wheel by the time, the bigger one makes 3 rev is

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a

8

b

12

c

10

d

6

answer is C.

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Detailed Solution

n1×2πr=n2×2πR

n=n2×Rr=3×0.50.15=10

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