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Two blocks of mass 2kg and 3 kg having c...

Two blocks of mass 2kg and 3 kg having coefficient of static friction 0.3 and 0.4 respectively joined by a spring of constant `100N//m` and kept level ground. What can be a possible extension in the spring so that both the blocks are in equilibrium?

A

`3cm`

B

`6cm`

C

`9cm`

D

`15cm`

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