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Multiplication with Vectors

Two tall buil...

Question

Two tall buildings are $30 m$ apart. The speed with which a ball must be thrown horizontally from a window $150 m$ above the ground in one building so that it enters a window $27.5 m$ from the ground in the other building is

A

2 m s^{- 1}

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B

6 m s^{- 1}

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C

4 m s^{- 1}

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D

8 m s^{- 1}

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Solution

The correct option is B $6 m s^{- 1}$

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