In the above situation all surface are frictionless system is released from rest. Then which of the following statements is/are correct
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In the following figure all surfaces are smooth. The system is released from rest , then :

A block of mass 'M' is placed on the top of a wedge of mass '4M'. All the surfaces are frictionless. The system is released from rest. The distance moved by the wedge at the instant, the block reaches the bottom will be

A block of mass M is placed on the top of a bigger block of mass 10 M as shown in figure. All the surfaces are frictionless. The system is released from rest, then the distance moved by the bigger block at the instant the smaller block reaches the ground :

A block of mass M is placed on the top of a bigger block of mass 10 M as shown in figure. All the surfaces are frictionless. The system is released from rest, then the distance moved by the bigger block at the instant the smaller block reaches the ground :

A block of mass M is placed on the top of a bigger block of mass 10 M as shown in figure. All the surfaces are frictionless. The system is released from rest, then the distance moved by the bigger block at the instant the smaller block reaches the ground :

A block of mass M is placed on the top of a bigger block of mass 10M as shown in fig. All the surfaces are frictionless. The system is releated from rest. The distance moved by the bigger block by the time the smaller block reaches the ground is

Forcd 'f' is applied on block 'B' and the system ramims at reast All surface are ruogh , which of the following statement (s) is /are correct