Question

A motorcyclist travels 98 km in 1 hour 10 minutes.calculate his average speed ,giving your answer in kilometres per hour.

Answer 1

84 because 98/70= 1.4, 1.4x60=84

Answer 2

10 minutes is 1/6 of an hour.

1 hour and 10 minutes = 7/6 hours

98 km / 7/6 = 98 x 6/7 = (98 x 6) /7 = 588/7 = 84 km per hour