A race car driver must average 197.0 km/h over the course of a time trial...

Bob Bobson

New member
...lasting ten laps. If the first nine? A race car driver must average 197.0 km/h over the course of a time trial lasting ten laps. If the first nine laps were done at 193.0 km/h, what average speed must be maintained for the last lap? (Answer to the nearest km/h.)
I keep 223 km/h but that is wrong
233 is wrong apparently
 
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