Paolo and Monika are both travelling by train. Paolo's train travels 70 km in 35 minutes.
Monika's train travels 684 km.
It leaves at 16:15 and arrives at 20:45.
Work out the difference, in km/h, between the average speed of their trains.

2911.5 km/h

Step-by-step explanation:

To tackle this question, you need to work out the average speed of each train and then find the difference.

Note that they want the answer km per hour.

Use the equation speed = distance / time

Paolo's train : 70 km × (35 / 60)

= 24.5 km/h

Monica's train :

For Monica's train you have to work out the time taken.

16 : 15 to 20 : 45 = 4.5 hours

Now subsitute into the speed = distance / time equation.

684km x 4.5 hrs

= 2916 km/s

Now find the difference between the two average speeds.

2916 - 4.5 = 2911.5 km/h

hope this helps :)

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step-by-step explanation: