Bob runs four laps. The average speed for the first lap is 12 km/h, the average speed for the second lap is 10km/h, the average speed for the third lap is 8km/h and the average speed for the last lap is 6km/h. What is average speed for the four laps

The average speed for the four laps is 9 km/h.

Step-by-step explanation:

The average speed of the four laps can be calculated as follows:

Where:

: is the average speed for the first lap

: is the average speed for the second lap

: is the average speed for the third lap

: is the average speed for the fourth lap

Hence, the average speed for the four laps is:  

Therefore, the average speed for the four laps is 9 km/h.

I hope it helps you!

i think u have 12 apples sorry again i don't really know if it correct i'm just tryna hrlp people out.