If the water in a stream is flowing with a velocity of 20 kmph and a boat is travelling from one bank to another bank, if the velocity of the boat in a direction perpendicular to the direction of the stream is 20 kmph and width of the stream is 2 km, then the time taken and the angle which boat makes with the direction of stream is

If the water in a stream is flowing with a velocity of 20 kmph and a b

1.	If the water in a stream is flowing with a velocity of 20 kmph and a boat is travelling from one bank to another bank, if the velocity of the boat in a direction perpendicular to the direction of the stream is 20 kmph and width of the stream is 2 km, then the time taken and the angle which boat makes with the direction of stream is
A.	6 min, 45°
B.	9 min, 30°
C.	12 min, 60°
D.	9 min, 90°
Answer» B. 9 min, 30°

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If the water in a stream is flowing with a velocity of 20 kmph and a boat is travelling from one bank to another bank, if the velocity of the boat in a direction perpendicular to the direction of the stream is 20 kmph and width of the stream is 2 km, then the time taken and the angle which boat makes with the direction of stream is
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