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A boat is moving with a velocity ...

A boat is moving with a velocity `3 hati +4 hatj` with respect to (d) ground, the water in the river is moving with a velocity `-3 hati -4 hatj` w.r.t. ground. The relative velocity of boat w.r.t. water is

A

`5 hati+6 hatj`

B

`6 hati+8 hatj`

C

`6 hatj+6 hatk`

D

`5 hatj+6 hatk`

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