Question

A swimmer’s speed with the water current is 15 km/hr. the speed of the water current is 2.5 km/hr. what is the swimmer’s speed against the current?

Answer 1

swimmer's speed with the current = 15 km/hr
=> speed of the swimmer + speed of the current = 15 km/hr

speed of the current is 2.5 km/hr
Hence, speed of the swimmer = 15 - 2.5 = 12.5 km/hr

swimmer's speed against the current = speed of the man - speed of the current
                                                           = 12.5 - 2.5 = 10 km/hr


i hope it will help you
regards