The problem of "a number divided by a score" in Mathematics It takes four fifths of an hour for a lorry to arrive at a speed of 45km per hour from place a to place B. It takes only two thirds of an hour for the lorry to return. How many kilometers per hour is the speed of the lorry when it returns
54km / h
45×4/5=36KM
36 divided by 2 / 3 = 54