The maximum tension a rope can with stand is 60kgwt . The ratio of maximum accelerations with which two boys of masses 30kg and 20kg can climb up the rope is, if g= 10 ms-2

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1:2

2:1

2:3

3:2

answer is A.

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Detailed Solution

T=m(g+a)⇒ 60g=30(a1+g)⇒ a1=g ⇒ 60g=20(a2+g)⇒ a2=2g⇒a1:a2=1 :2

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