On a road trip, Sara’s brother drove 47.5% of the trip, and Sara drove 80% of the remainder. If Sara drove for 4 hours and 12 mi
nutes, how long was the road trip?
1 answer:
Let's put it all into minutes, and then solve. 4 * 60 + 12 = 252 minutes.
252 / 80 = 3.15.
3.15 * 100 = 315 = 52.5% of the trip.
315 / 52.5 = 6
6 * 100 = 600 minutes
600 / 60 = 10 hour road trip.
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