document.write( "Question 1077949: a boat travels 70 miles and then comes back, the current was 20 mph the total trip time was 4 hours and 40 minutes, how fast was the boat traveling \n" ); document.write( "

Algebra.Com's Answer #692473 by MathTherapy(10556) $\"\"$ $\"About$

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a boat travels 70 miles and then comes back, the current was 20 mph the total trip time was 4 hours and 40 minutes, how fast was the boat traveling
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Let boat's speed be S
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document.write( "Then we get the following TIME equation: _____
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document.write( "70(3)(S + 20) + 70(3)(S - 20) = 14(S - 20)(S + 20) -------- Multiplying by LCD, 3(S - 20)(S + 20)
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document.write( "(S - 40)(S + 10) = 0
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document.write( "S, or boat's speed =           OR         S = - 10 (ignore) \n" );
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