a car travels at 145 m at a rate of 12 m/s north. it then travels 232 m at rate of 16 m/s south whats the average speed

Question

a car travels at 145 m at a rate of 12 m/s north. it then travels 232 m at rate of 16 m/s south whats the average speed

Answer 1

speed = distance / time

 

at north

 

12 = 145 /time

 

time = 145 /12 = 12.083 seconds

 

at south

16 = 232/time

time = 232/16 = 14.5 seconds

 

average speed = total distance / total time

                      = 145 +232  /   12.083 +14.5

                      = 377 / 26.583

                     = 14.182 m/s