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90.

In a bicycle the radius of rear wheel is twice the radius of front wheel.  If rF and rr are the radii, vF and vr are speeds of top most points of wheel, then

(a)           vr = 2 vF

(b)          vF = 2 vr   

(c)           vF = vr

(d)          vF > vr

Ans. c

(15)

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