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fredd [130]
3 years ago
7

A motorboat heads upstream a distance of 24 miles on a river whose current is running at 3 miles per hour. The trip up and back

takes 6 hours. Assuming that the motorboat maintained a constant speed relative to the water, what was its speed?
Mathematics
2 answers:
Drupady [299]3 years ago
7 0
9mph is the boat's actual speed.
12mph with the stream and 6mph against the stream.
12mph takes 2 hours to get there and 6mph takes 4 to get back = 6hours.
Kryger [21]3 years ago
6 0
To get speed you do Distance/Time.
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\bf \stackrel{3\cdot \frac{126}{3+2+6+7}}{3}~~:~~\stackrel{2\cdot \frac{126}{3+2+6+7}}{2}~~:~~\stackrel{6\cdot \frac{126}{3+2+6+7}}{6}~~:~~\stackrel{7\cdot \frac{126}{3+2+6+7}}{7} \\\\\\ 3\cdot \cfrac{126}{18}~~:~~2\cdot \cfrac{126}{18}~~:~~6\cdot \cfrac{126}{18}~~:~~7\cdot \cfrac{126}{18} \\\\\\ 21~~:~~\stackrel{shortest}{14}~~:~~42~~:~~49

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Step-by-step explanation:

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