Niamh was driving back home following a business trip. She looked at her Sat Nav at 1730 Time 1730 Distance to destination 143 miles Niamh


Niamh was driving back home following a business trip.
She looked at her Sat Nav at 1730
Time
1730
Distance to destination 143 miles
Niamh arrived home at 1942
Work out the average speed of the car, in mph, from 1730 to 1942
You must show all your working.


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