A family drove to a resort at an average speed of 25 mph and later returned over the same road at an average speed of 40 mph. Find the distance to the resort if the total driving time was 13 h.
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Answer:
A family drove to a resort at an average speed of 25 mph and later returned over the same road at an average speed of 40 mph. Find the distance to the resort if the total driving time was 13 hours.
Explanation:
s = d/t
d = st
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average speed for the whole trip:
s = (25 + 40)/2
s = 32.5 mph
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total distance driven:
d = 32.5*13
d = 422.5 miles
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distance to resort:
d/2 = 422.5/2
d/2 = 211.25 miles
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