A boat travels a particular distance downstream in one hour and returns in the same amount of time. What is the speed of the boat on calm water if the stream is moving at 3 kmph?
A. 12 kmph
B. 13 kmph
C. 14 kmph
D. 15 kmph
Answer:D
A boat travels a particular distance downstream in one hour and returns in the same amount of time. What is the speed of the boat on calm water if the stream is moving at 3 kmph?
A. 12 kmph B. 13 kmph C. 14 kmph D. 15 kmph
Explanation: Let's say the boat's top speed in calm water is x kmph. Then,(x + 3) kmph downstream speed Upstream speed = (x - 3) kmph,(x + 3) x 1 = (x - 3) x 3/2 ,3x - 9 = 2x + 6,x equals 15 kilometres per hour.