(245+r)/2 = 230 km/h
245 + r = 460
r = 460-245 = 215 km/h.
In order to qualify for the finals in a racing
event, a race car must achieve an average
speed of 230 km/h on a track with a total
length of 1810 m.
If a particular car covers the first half of the
track at an average speed of 245 km/h, what
minimum average speed must it have in the
second half of the event in order to qualify?
Answer in units of km/h
1 answer
1 answer