A race car completes a lap on a 1600 m long track with an average speed of 250 km/h. If the car's average speed on the first half of the track was 225 km/h, what was its average speed on the second half?

Answer 1

avg speed=distance/time

time for a lap=1.600/250 hr=.0064 hr

time for the first half lap=.800/225= .0035555 hr

time for second half lap= .0064-.0035555= .0028445

avg speed on second half= .8/.0028445 km/hr

This certainly is a small track for such high speeds.

Answer 2

284