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Two particles P and Q simultaneously start moving from point A with velocities 15 m/s and 20 m/s, respectively. The two particles move with accelerations equal in magnitude but opposite in direction. At some instant velocity of P is 30 m/s. The velocity of Q at this instant

a
5 m/s
b
30 m/s
c
20 m/s
d
15 m/s

detailed solution

Correct option is A

For P, 30=15+at or at=15 m/sFor Q, v=20-at or v=20-15=5 m/s

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