Example
Point A and Point B are 120 m apart. Point B and Point C are 300 m apart. Ben ran from Point A to Point B in 15 seconds. Then, he runs from Point B to Point C in 55 seconds. Find Ben’s average speed for the distance from Point A to Point C.
Solution:
Total distance from Point A to Point C = 120 + 300 = 420 m
Time taken to run from Point A to Point C = 15 + 55 = 70 s
Ben’s average speed is 6 m/s.
Example:
Pauline swam for 100 seconds at a speed of 2.5 m/s. Then, she swam for another 100 seconds at a speed of 1.5 m/s. Find Pauline’s average speed.
Solution:
For the first part,
Distance swum = 2.5 × 100 = 250 m
For the second part,
Distance swum = 1.5 × 100 = 150 m
Total distance swum = 250 + 150 = 400 m
Total time taken = 100 + 100 = 200 s
Average speed = 400 ÷ 200 = 2 m/s
Pauline’s average speed was 2 m/s
Try the free Mathway calculator and
problem solver below to practice various math topics. Try the given examples, or type in your own
problem and check your answer with the step-by-step explanations.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.