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Q.

The maximum tension a rope can with stand is 60kgwt. The ratio of maximum accelerations with which two boys of masses 20kg and 30kg can climb up the rope is,

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a

1 : 2

b

2 : 1

c

2 : 3

d

3 : 2

answer is B.

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Detailed Solution

T=m(g+a) 60g=20(g+a1)⇒a1=2g 60g=30(g+a2)⇒a2=g a1a2=21

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