document.write( "Question 1095687: Two hoses, when connected to a swimming pool,can fill the pool together in 4 hours. If the larger hose alone is used, it can fill the pool in 6 hours less than the smaller hose. How long will it take the smaller hose to fill the swimming pool alone? \n" ); document.write( "
Algebra.Com's Answer #710242 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Two hoses, when connected to a swimming pool, can fill the pool together in 4 hours. \n" ); document.write( " If the larger hose alone is used, it can fill the pool in 6 hours less than the smaller hose. \n" ); document.write( " How long will it take the smaller hose to fill the swimming pool alone? \n" ); document.write( ": \n" ); document.write( "Let s = time required by the small hose to fill the pool alone \n" ); document.write( "then \n" ); document.write( "(s-6) = time required by the large hose \n" ); document.write( ": \n" ); document.write( "Let the completed job = 1 (a full pool) \n" ); document.write( ": \n" ); document.write( "Each hose does a fraction of the job, the two fractions add up to 1 \n" ); document.write( " \n" ); document.write( "multiply equation by s(s-6) \n" ); document.write( "s(s-6)* \n" ); document.write( "Cancel the denominators and you have \n" ); document.write( "4s + 4(s-6) = s^2 - 6s \n" ); document.write( "4s + 4s - 24 = s^2 - 6s \n" ); document.write( "8s - 24= s^2 - 6s \n" ); document.write( "arrange as a quadratic equation \n" ); document.write( "0 = s^2 - 6s - 8s + 24 \n" ); document.write( "s^2 - 14s + 24 = 0 \n" ); document.write( "Factors to \n" ); document.write( "(s-12)(s-2) = 0 \n" ); document.write( "two solutions \n" ); document.write( "s = 2 \n" ); document.write( "and the reasonable solution \n" ); document.write( "s = 12 hrs is time required to fill the pool with the small hose \n" ); document.write( ": \n" ); document.write( "the large hose takes 6 hrs less, therefore \n" ); document.write( "6 hrs is the time required by the large hose \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( ": \n" ); document.write( "See if that checks out \n" ); document.write( " \n" ); document.write( "reduce fractions \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |