A river flows at 1 km h⁻¹. A swimmer starts from A and wants to reach C as shown, where AB=BC=400 m. His speed relative to water is 5 km h⁻¹. At what angle θ with the river bank should he swim?
Physics · Kinematics part-3 Relative motion · River problem
A river flows at 1 km h⁻¹. A swimmer starts from A and wants to reach C as shown, where AB=BC=400 m. His speed relative to water is 5 km h⁻¹. At what angle θ with the river bank should he swim?

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