document.write( "Question 164478: An Oil Tanker can be filled in 10 hrs from one pipe. It can be filled by another pipeline in 8 hrs. How long will it take to fill the tank if both pipe lines are used.\r
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\n" ); document.write( "\n" ); document.write( "need a break down of how my book got 4 4/9 hours to fill the tanker using both pipes.
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Algebra.Com's Answer #121197 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
10*8/(10+8)=80/18=4.444 HOURS TO FILL THE TANK USING BOTH PIPES.
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