angelZ2908 angelZ2908

15-03-2024
Physics

contestada

A man crosses a river by swimming. If he crosses river in minimum time of 10 minutes. The river speed in 4 km/hr. What was speed of swimmer with respect to river, if its width is 400 m ?
A. 2.4 km/hr
B. 3.2 km/hr
C. 6.2 km/hr
D. 5.1 km/hr

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