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Home Q & A Board Science-Related Homework Help Mathematics
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dickcheney111 dickcheney111
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3 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

College Algebra


Edition: 7th
Author:
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Cheesehead123Cheesehead123
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#2
A year 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...
#3
A year ago
The distance formula is   distance = rate*time

When 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 the
rowing speed 'r' minus the current 'c'

{See attachment}

Therefore the rate of current is 8.4 miles/hr
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