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A particle of mass 2m is projected at an...

A particle of mass `2m` is projected at an angle of `45^@` with horizontal with a velocity of `20sqrt2m//s`.
After `1s`, explosion takes place and the particle is broken into two equal pieces.
As a result of explosion one part comes to rest. Find the maximum height attained by the other part. (Take `g=10m//s^2`)

A

35 m

B

40 m

C

15 m

D

20 m

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The correct Answer is:
A
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