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Two bodies of masses m and 2m are moving...

Two bodies of masses m and 2m are moving along positive x and y axes respectively with equal speed `4 ms^-1`. They collide at origin and stick together. The final velocity of combined mass is

A

`(4hati+8hatj) ms^-1`

B

`(frac{4}{3}hati+frac{8}{3}hatj)ms^-1`

C

`(frac{4}{3}hati+8hatj)ms^-1`

D

`(4hati+frac{8}{3}hatj)ms^-1`

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The correct Answer is:
c
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