River Crossing Time (Jee Mains) | ExamDuo
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Relative Velocity
Medium
River Crossing Time
A man can swim with a speed of 4km h⁻¹ in still water. How long (in minutes) does he take to cross a river 1 km wide if the river flows steadily at 3km h⁻¹ and he makes his stroke normal to the river current?
SELECT ONE OPTION
A
5 min
B
10 min
C
15 min
D
20 min
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