Question : If a boat goes upstream at a speed of 21 km/hr and comes back the same distance at 28 km/hr, what is the average speed (in km/hr) for the total journey?
Option 1: 24.5
Option 2: 24
Option 3: 25
Option 4: 25.4
Answer (1)
24th Jan, 2024
Correct Answer: 24
Solution :
Given: Upstream speed of boat = 21 km/hr
Downstream speed of boat = 28 km/hr
For the same distance,
Average speed =
So, the average speed =
Hence, the correct answer is 24.
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