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

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