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Two particles A and B are initially 40 m...

Two particles `A` and `B` are initially `40 m`apart, `A` is behind `B`. Particle `A` is moving with uniform velocity of `10 m s^(-1)` towards `B`. Particle `B` starts moving away from `A` with constant acceleration of `2 m s^(-1)`.
The time for which there is a minimum distance between the two is .

A

45 m

B

15 m

C

35 m

D

30 m

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The correct Answer is:
B
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