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olga_2 [115]
2 years ago
15

A motorboat travels 35 km in 2 hours with the current of the river. The same motorboat travels 39 km in 3 hours in a lake. Find

the speed of the current.
Mathematics
1 answer:
Svetradugi [14.3K]2 years ago
5 0

Answer:

0.5km/h

Step-by-step explanation:

Assume lake has no current.

.

V=distance / time

V=39km / 3h

V=13km/h

In water Assume boat used same power travelling

V=35km / 2h

V= 12.5km/h

Current is the difference 0.5km/h

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