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River is flowing with a velocity v(BR)=4...

River is flowing with a velocity `v_(BR)=4hatim//s`. A boat is moving with a velocity of `v_(BR)=(-2hati+4hatj)m//s` relative to river. The width of the river is `100m` along `y`-direction. Choose the correct alternative(s)

A

The boatman will cross the river in `25s`

B

Absolute velocity of boatman is `2sqrt(5)m//s`

C

Drift of the boatman along the river current is `50m`

D

The boatman can never cross the river

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A, B, C
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