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# Julie and Eric row their boat (at a constant speed) 21 miles downstream for 3 ...

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Posts: 163
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2 years ago
Solve the problem.

Julie and Eric row their boat (at a constant speed) 21 miles downstream for 3 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 7 hours. Find the rate of the current.

▸ 3 mph

▸ 2 mph

▸ 5 mph

▸ 1.5 mph
Textbook

## College Algebra

Edition: 7th
Author:
3 Replies
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Answer verified by a subject expert
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Posts: 83
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2 years ago

### Related Topics

wrote...
A month ago
 Solve the problem and answer the question. Julie and Eric row their boat (at a constant speed ) 48 miles downstream for 4 hours, helped by the current. Rowing at the same rate, the trip back against the current takes 10 hours. Find the rate of the current.
Anonymous
wrote...
A month ago
 The distance formula is   distance = rate*timeWhen going downstream the rate of speed was rowing speed 'r'plus the speed of the current 'c'When returning against the current the rate of speed was therowing speed 'r' minus the current 'c'{See attachment}Therefore the rate of current is 8.4 miles/hr Attached file Thumbnail(s): You must login or register to gain access to this attachment.