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A boat can travel with a speed of 12 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

4 hr
4.25 hr
4.5 hr
6 hr
Explanation:

speed of boat in still water = 12 km/hr

speed of the stream = 4 km/hr

Speed downstream = (12+4) = 16 km/hr

Time taken to travel 68 km downstream $=\dfrac{68}{16}=\dfrac{17}{4}$ = 4.25 hours

Additional Questions

A boat can travel with a speed of 22 km/hr in still water. If the speed of the stream is 5 km/hr, find the time taken by the boat to go 54 km downstream

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A boat running downstream covers a distance of 22 km in 4 hours while for covering the same distance upstream, it takes 5 hours. What is the speed of the boat in still water?

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Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:

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A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

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If a mans rate with the current is 15 km/hr and the rate of the current is 11/2 km/hr, then his rate against the current is

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The speed of the boat in still water in 12 kmph. It can travel downstream through 45 kms in 3 hrs. In what time would it cover the same distance upstream?

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The current of a stream runs at 1km/hr. A motor boat goes 35 km. upstream and back again to the starting point in 12 hours. The speed of motor boat in still water is :

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