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The resultant of forces `vecP` and `vec Q` is `vecR` . If `vec Q` is doubled the `vecR` is doubled . If the direction of `vec Q` is reversed , then `vec R` is again doubled , then `P^2 : Q^2 : R^2` is

A

`2:3:1`

B

`3:1:1`

C

`2:3:2`

D

`1:2:3`

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The correct Answer is:
C
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DISHA PUBLICATION-VECTOR ALGEBRA-EXERCISE -2 : CONCEPT APPLICATOR
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