A boat moves at 12 km/h in still water and 19 km/h downstream. Find its speed against the stream.

Q: A boat moves at 12 km/h in still water and 19 km/h downstream. Find its speed against the stream.

Solution: s = (down − still) = 19 − 12 = 7; upstream = b − s = 12 − 7 = 5 km/hr.

Difficulty: Easy

5 km/hr
3 km/hr
8 km/hr
Data inadequate
—

Correct Answer: 5 km/hr

Explanation:

Solution:
s = (down − still) = 19 − 12 = 7; upstream = b − s = 12 − 7 = 5 km/hr.

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