Question

A mptprbpat travels downstream on a river for five hours. The speed of the current is 2km/h. The river flows into a still lake and the motoboat continues for two more hours. The distance covered by the boat on the river was 40km more than the distance it covered on the lake. Whatis the speed of the motorboat in still water?

Answer 1

Answer:

10 km/hr

Step-by-step explanation:

5 hrs = 40 more with 2 km/hr current

2 hrs= less 40 no current

40-2x5=30

30 without current for three hours

30/3=10 km/hr no current

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CHECK

10x2=20

10x5=50+2x5=60

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