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If $\overset{⇀}{A} + \overset{⇀}{B} = \overset{⇀}{R}$ and $2 \overset{⇀}{A} + \overset{⇀}{B}$ is perpendicular to $\overset{⇀}{B}$ then

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A = R

B = 2R

B = R

B = A

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detailed solution

Correct option is A

given is perpendicular to

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If A⇀+B⇀=R⇀ and 2A⇀+B⇀ is perpendicular to B⇀ then

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If $\overset{⇀}{A} + \overset{⇀}{B} = \overset{⇀}{R}$ and $2 \overset{⇀}{A} + \overset{⇀}{B}$ is perpendicular to $\overset{⇀}{B}$ then