A go cart racetrack has 100-meter straightways and semicircular ends with diameter of 40 meters. Calculate the average speed in meters per minute of a go cart if it completes 4 laps in 6 minutes.

Question

anonymous · Answer

the length of circumference for a semicircle is
1/2  *pi  *diameter.
=1/2  * pi * 40 = 20pi.

the length of a lap is 100+20pi.

to find the average speed, divide the total distance by total time.
in your case, average speed= 4 laps / 6 minutes.

anonymous · Answer

thanks!