Question

A moterboat that ravels with a speen of 20km/hour in still water has traveld 20 km against the current and 180km with the current having spent 8 hours on the entire trip find the speed of the current of the riveer.
plz help ill give brainliest

Answer 1

Answer:

10 kph

Step-by-step explanation:

Find the speed of the current of the river.

20/(20 - c) + 180/(20 + c) = 8

20(20 + c) + 180(20 - c) = 8(400 - c^2)

8c^2 - 160c  + 800 = 0

8(c^2 - 20c + 100) = 0

8(c - 10)^2 = 0

c = 10

The speed of the current of the river is 10 km/hour.

Answer 2

10 kph because if you divide