What is your average speed in m/s when you go from -2 m to 10 m in 3.2 s and then from 10 m to -12 m in 5.4 seconds?
A)-2.7
B)29.4
C)11.2
D)3.95
E)0.34

Question

Quizplus · Accepted Answer

The average speed is total distance (20m + 22m = 42m) divided by the total time taken (3.2s + 5.4s = 8.6s). 
Average speed = 42m/8.6s = 4.88 m/s 
Therefore, the answer is D) 3.95 (nearest whole number rounded off).

What Is Your Average Speed in M/s When You Go