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Three boys are running on a equitriangul...

Three boys are running on a equitriangular track with the same speed `5 ms^(-1)`. At start, they were at the three corners with velocity along indicated directions. The velocity of approach of any one of them towards another at `t = 10 s` equals

A

`7.5 ms^(-1)`

B

`10 ms^(-1)`

C

`5 ms^(-1)`

D

`0ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
d. At t = 10 s.

Along the line joining any two, `v_r = 5cos60^@ - 5 cos 60^@ =0` .
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