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Three blocks A, B and C are lying on a smooth horizontal surface, as shown in the figure. A and B have equal masses, m while C has mass M. Block A is given an initial speed v towards B due to which it collides with B perfectly inelastically 5 6 th of the initial kinetic energy is lost in whole process. What is value of M/m? m A m B M C

1. 2
2. 3
3. 5
4. 4

Correct answer: 4

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