Question

dean drives a distance of 760km in 9 hours. Robert drives a distance of 559km in 6 hours 30 minutes. who has the highest average speed? show how you decide.

Answer 1

Robert has the highest average speed.

Explanation:

Given : Distance travelled by Dean = 760 km

Time taken by Dean = 9 hours

Distance travelled by Robert = 559 km

Time taken by Robert = 6.5 hours

To find : Highest average speed

Solution :

Speed = Distance/ Time

Case 1 ( Dean's case ) :

Speed = 760 / 9

= 84.44 km / hr

Case 2 ( Robert's case ) :

Speed = 559 / 6.5

= 86 km / hr

So, by comparing the speed values, we can find that the average speed of Robert's is higher than Dean's.

Hence, Robert has the highest average speed.