A ship can travel at a speed of 15 km/hr in still water. If the speed of the stream is 5 km/hr, find the time taken by the boat to travel the distance of 60 km downstream.

120 minutes

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180 minutes

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90 minutes

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100 minutes

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Solution

The correct option is B 180 minutes
Speed of the boat in still water = 15kmph
speed of the stream = 5kmph
Speed downstream = 15+5 = 20kmph
Required time = distance /speed = $\frac{60 km}{20 kmph}$ = 3 hours = 180 minutes.

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A ship can travel at a speed of 15 km/hr in still water. If the speed of the stream is 5 km/hr, find the time taken by the boat to travel the distance of 60 km downstream.

The correct option is B 180 minutesSpeed of the boat in still water = 15kmph speed of the stream = 5kmph Speed downstream = 15+5 = 20kmph Required time = distance /speed = 60km20kmph = 3 hours = 180 minutes.

The correct option is B 180 minutes
Speed of the boat in still water = 15kmph
speed of the stream = 5kmph
Speed downstream = 15+5 = 20kmph
Required time = distance /speed = $\frac{60 km}{20 kmph}$ = 3 hours = 180 minutes.