Correct option is A
Given:
An object travels 9 m in 3 seconds
and then another 23 m in 5 seconds
Formula Used:
Average Speed = Total Distance/Total Time
Solution:
=> Total distance = 9 + 23 = 32 m
=> Total time = 3 + 5 = 8 sec
Now, Average speed = Total distance/Total time
=> 32/8 = 4 m/sec
∴ The average speed is 4 m/s.