A river is 20 m wide. River speed is 3 m/s. A boat starts with velocity 22 m/s at angle 45° from the river current (relative to river). Find the time taken by the boat to reach the opposite bank.

t=ωidth of rivervelocity perpendicular to flow=202=10 s

A river is 20 m wide. River speed is 3 m/s. A boat starts with velocity 22 m/s at angle 45° from the river current (relative to river). Find the time taken by the boat to reach the opposite bank.

t=ωidth of rivervelocity perpendicular to flow=202=10 s

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A river is $20 m$ wide. River speed is $3 m / s$ . A boat starts with velocity $2 \sqrt{2} m / s$ at angle $45 °$ from the river current (relative to river). Find the time taken by the boat to reach the opposite bank.

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20 s

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answer is B.

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A river is 20 m wide. River speed is 3 m//s. A boat starts with velocity 2sqrt2 m//s at angle 45^@ from the river current (relative to river) (a) Find the time

$t = \frac{ω i d t h o f r i v e r}{v e l o c i t y p e r p e n d i c u l a r t o f l o w} = \frac{20}{2} = 10 s$

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A river is 20 m wide. River speed is 3 m/s. A boat starts with velocity 22 m/s at angle 45° from the river current (relative to river). Find the time taken by the boat to reach the opposite bank.

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A river is $20 m$ wide. River speed is $3 m / s$ . A boat starts with velocity $2 \sqrt{2} m / s$ at angle $45 °$ from the river current (relative to river). Find the time taken by the boat to reach the opposite bank.