Walking at the rate of 4 kmph a man cover a certain distance in 2 hr 45 min. Running at a speed of 16.5 kmph the man will cover the same distance in.
Distance = Speed × timeHere time = 2hr 45 min = 11/4 hrDistance = 4×11/4=11 kmNew Speed =16.5 kmphTherefore time = D/S=11/16.5=40 min