Quantitative Aptitude • Time, Speed & WorkMedium
A boat moves at 5 km/h in still water and the stream flows at 1 km/h. How long will the boat take to go 24 km downstream and come back?
A. 4 hours
B. 9.6 hours
C. 6 hours
D. 10 hours✓ Correct Answer
💡 Solution & Explanation
Downstream the stream helps: 5 + 1 = 6 km/h, so going takes 24 ÷ 6 = 4 hours. Upstream the stream works against it: 5 − 1 = 4 km/h, so coming back takes 24 ÷ 4 = 6 hours. Total time = 10 hours.
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