A body P moving with a velocity of 20 Kms^(-1) collides with another body of Q of the same mass at rest. After collision the velocity of Q if P comes to rest after collision is

A body P moving with a velocity of 20 Kms^(-1) collides with another b

1.	A body P moving with a velocity of 20 Kms^(-1) collides with another body of Q of the same mass at rest. After collision the velocity of Q if P comes to rest after collision is
Answer» `10 Kms^(-1)` `20 Kms^(-1)` `30 Kms^(-1)` `5 Kms^(-1)` Answer :B