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Q.

Two particles A and B are projected simultaneously in the direction shown in the figure with velocities VA=20ms−1 and VB=10ms−1 respectively. If they collide in air after 1/2sec. then

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a

 the angle θ is 37∘

b

 the angle θ is 45∘

c

 the angle θ is 30∘

d

 the angle θ is 60∘

answer is C.

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Detailed Solution

20sin⁡θ=10⇒sin⁡θ=12⇒θ=30∘

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