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21 April, 08:15

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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Answers (1)
  1. 21 April, 08:43
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    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.
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