If veca is a vector of magnitude 50 ,co...

If `veca` is a vector of magnitude 50 ,collinear with the vector
`vecb=6hati-8hatj-(15)/(2)hatk` and makes an acute angle with the
positive direction of z - axis then `veca` is equal to

A

`-24hati+32hatj+30hatk`

B

`24hati-32hatj-30hatk`

C

`12hati-16hatj-15hatk`

D

`-12hati+16hatj-15hatk`

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The correct Answer is:

A

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