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A butterfly is flying with velocity `10hati +12hatj m//s` and wind is blowing along `x` axis with velocity `u` . If butterfly starts motion from `A` a

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A butterfly is flying with velocity `10hati +12hatj m//s` and wind is blowing along `x` axis with velocity `u` . If butterfly starts motion from `A` and after some time reaches point `B`, find the value of `u`.
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Correct Answer - `6m//s`
`vecV_(R ) = (10+u) hati +12hatj`
`tan37^(@) = (12)/(10+u)`
`(3)/(4) = (12)/(10+u)`
`30 +3u = 48 rArr 3u = 18 rArr u = 6m//s`
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