# SOLUTION: It takes Dan 20 minutes to mow the lawn; it takes his sister,Sue, 15 minutes to mow the same lawn. If they work together, how long will it take to mow the lawn?

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Travel -> SOLUTION: It takes Dan 20 minutes to mow the lawn; it takes his sister,Sue, 15 minutes to mow the same lawn. If they work together, how long will it take to mow the lawn?      Log On

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 Click here to see ALL problems on Travel Word Problems Question 475953: It takes Dan 20 minutes to mow the lawn; it takes his sister,Sue, 15 minutes to mow the same lawn. If they work together, how long will it take to mow the lawn?Answer by jorel1380(2518)   (Show Source): You can put this solution on YOUR website!1/20+1/15=1/t 3t+4t=60 7t=60 t=60/7 minutes..