A swimmer reaches the other Bank of a flowing river exactly opposite t

1.	A swimmer reaches the other Bank of a flowing river exactly opposite to starting point if he was swimming at 2 km / he while maintaining 150° with the flow then time taken by him to cross the river 1 km wide is
Answer» Answer: 1 hr Explanation: A swimmer reaches the other Bank of a flowing river exactly opposite to STARTING POINT if he was SWIMMING at 2 km / he while MAINTAINING 150° with the flow then time taken by him to cross the river 1 km wide is Swimming at 2 km/hr Angle = 150° Horizontal Speed = 2 * Cos150° = 2 * (-√3/2) = -√3 km /hr Compensated the flow ( as he reaches just opposite ) Vertical speed = 2 Sin 150° = 2 * (1/2) = 1 km/Hr Resultant Speed = 1 km/hr River Width = 1 km Time taken = 1/1 = 1 hr

A swimmer reaches the other Bank of a flowing river exactly opposite to starting point if he was swimming at 2 km / he while maintaining 150° with the flow then time taken by him to cross the river 1 km wide is

Answer»

Answer:

1 hr

Explanation:

A swimmer reaches the other Bank of a flowing river exactly opposite to STARTING POINT if he was SWIMMING at 2 km / he while MAINTAINING 150° with the flow then time taken by him to cross the river 1 km wide is

Swimming at 2 km/hr

Angle = 150°

Horizontal Speed = 2 * Cos150° = 2 * (-√3/2) = -√3 km /hr

Compensated the flow ( as he reaches just opposite )

Vertical speed = 2 Sin 150° = 2 * (1/2) = 1 km/Hr

Resultant Speed = 1 km/hr

River Width = 1 km

Time taken = 1/1 = 1 hr

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