The steam of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of the swimmer with respect to the flow of the river to cross the river straight?
(a)
60°
(b)
90°
(c)
150°
(d)
120°
The steam of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of the swimmer with respect to the flow of the river to cross the river straight?
(a)
60°
(b)
90°
(c)
150°
(d)
120°
Question ID - 51209 | SaraNextGen Top Answer
The steam of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of the swimmer with respect to the flow of the river to cross the river straight?
(a)
60°
(b)
90°
(c)
150°
(d)
120°
|
The steam of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of the swimmer with respect to the flow of the river to cross the river straight? |
|||
|
(a) |
60° |
(b) |
90° |
|
(c) |
150° |
(d) |
120° |
1 Answer
127 votes
Answer Key / Explanation : (d) -
Draw velocity diagram
sin
= 
= 30°
= 90 + 
= 120°
127 votes
Answer Link
127