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To get to work, you drive for 20 minutes at 30 mph, and walk 10 more minutes at 3 mph. what was your average speed? a.16.5 mph b.20 mph c.21 mph d.23 mph submit
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To get to work, you drive for 20 minutes at 30 mph, and walk 10 more minutes at 3 mph. what was your average speed?

a.16.5 mph
b.20 mph
c.21 mph
d.23 mph submit

User GregGalloway
by
5.9k points

1 Answer

4 votes
20 min at 30 mph = 10 miles
10 min at 3 mph = .5 miles
So, in 30 minutes you travel 10.5 miles
In one hour, you would travel 21 miles.
Therefore, your average speed was 21 mph.
Answer is c.



User RandyDaddis
by
5.9k points
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