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Sam drives to work. When she averages 20mph, it takes 40 minutes. If she manages to average 30mph, how long will it take?

Sam drives to work. When she averages 20mph, it takes 40 minutes. If she manages to average 30mph, how long will it take?
asked 143k views
3 votes
Sam drives to work. When she averages 20mph, it takes 40 minutes. If she manages to average 30mph, how long will it take?

asked
User Carlos Castillo
by
7.1k points

2 Answers

2 votes
15minutes
40min=2mile
30/2
answered
User Sebastien Bianchi
by
7.8k points
5 votes
60Mph

Because if 20 miles is equal to 40 minutes. 10 more miles would make half of 40 (20), adding it all together would make it 60MPH. Hope this helps!
answered
User Jackreichert
by
8.1k points
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