Question

a Boat takes 2 hours to travel 8 km down and 8 km up the river with the water is still how much time will the boat take to make the same group when the river starts flowing at 4 km per hour​

Answer 1

the boat will take 212 hr

Answer 2

time = distance/speed

speed of boat = x

time = 2

so,

8/x + 8/x = 2

but if we take x=4

8/4 + 8/4 = 4 hrs

time taken will br 4 hrs in still water.

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