d = V*T = 16km.
250*T = 16.
T = 0.064 h. to drive the full length.
d1 = 230*t1 = 8 km.
t1 = 0.035 h to cover 1st half of the length.
t2=0.064 - 0.035 = 0.0292 h to cover the
last 8 km.
Vavg = d2/t2 = 8/0.0292 = 274 km/h.
To qualify for the finals in a racing event a car must achieve an average speed of 250 km/h on a track with a total length of 16,000 m if a particular car covers the first half of the track at an average speed of 230 km/h what minimum average speed Must It have in the second half of the event to qualify
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1 answer