A boat’s still-water speed is 10 km/h. If its downstream speed is 13 km/h, find the stream speed.

Q: A boat’s still-water speed is 10 km/h. If its downstream speed is 13 km/h, find the stream speed.

Solution: d = b + s ⇒ s = 13 − 10 = 3 km/hr.

Difficulty: Easy

1.5 km/hr
3 km/hr
11.5 km/hr
5.75 km/hr
—

Correct Answer: 3 km/hr

Explanation:

Solution:
d = b + s ⇒ s = 13 − 10 = 3 km/hr.

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