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A boat can move at 5 km/h in still water...

A boat can move at 5 km/h in still water(i.e, when water is not flowing).The speed of stream of the river is 1 km/h .A boat takes 80 min to go from a point A to another point B and return to the same point. What is the distance between two points

A

A) 3.2 km

B

B) 4 km

C

C) 4.2km

D

D) 4.5km

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A boat can move at 5 km/h in still water (i.e., when water is not flowing). The speed of stream of the river is 1 km/h. A boat takes 80 minutes to go from a point A to another point B and return to the same point. (i) What is the distance between the two points? (ii) What is the ratio of downstream speed and upstream speed? (iii) What is the ratio of time taken in downstream speed to the upstream speed?

A boat can move at 5 km/h in still water(i.e, when water is not flowing).The speed of stream of the river is 1 km/h .A boat takes 80 min to go from a point A to another point B and return to the same point. What is the ratio of downstream speed and upstream speed?

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