Question

A boat travels from point 'Y' to point 'Z' downstream and then returns to point 'X', which is located midway between 'Z' and 'Y'. The entire trip takes 11 hours. The distance between points 'Y' and 'Z' is 150 km. If the boat's speed in still water is three times the speed of the stream, determine how long it will take the boat to travel 180 km upstream.

Q: Answer-A boat travels from point 'Y' to point 'Z' downstream and then returns to point 'X', which is locate...

Let stream speed s Boat speed in still water 3s Downstream speed 4s, Upstream speed 2s Time 1504s 752s 11 37.5s 37.5s 11 75s 11 s 7511 Upstream speed 2s 15011 Time for 180 km upstream 180 15011 665 13.2 hours

A 18 hours

B 13.2 hours

C 16 hours

D 15.5 hours

E 10 hours

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