Question

John travels 20km at an average speed of 40km/h while Mary travels 80km at an average speed of 120km/h. John and Mary depart at the same time. Determine by calculation who arrives earlier at Cheir respective destination.​

Answer 1

Explanation:

20÷40

=0'5×60min

30min

80÷120

=0,6666666667×60

=40mins

john will arrive earlier