Two men of masses `80 kg` and `60 kg` are standing on a wooden plank of mass `100 kg`, that has been placed over a smooth surface. If both the men start moving toward each other with speeds `1 m / s` and `2 m / s`, respectively, then the magnitude of velocity of the plank by which it starts moving is `|(p)/(q)| m / (s)`. Find `(p+q)`.
'(##CEN_KSR_PHY_JEE_C08_E01_010_Q06##)'

Answer

7