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127. Solid cylinders of radii

Solid cylinders of radii  r1,r2,r3  and  roll down an inclined plane from the same place simultaneously. If ,  r1>r2>r3  which one would reach the bottom first

(a)   Cylinder of radius

(b)  Cylinder of radius

(c)   Cylinder of radius

(d)  All the three cylinders simultaneously

Ans. d

(12)

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