Quandaries
and Queries 

PLease help with this problem... Dan can paint a car in 4 hours. Luke can pain the same car in 6 hours. Working together, how long would it take them to pain the same car? 

Hi, Dan can paint a car in 4 hours so he paints at the rate of ^{1}/_{4} cars per hour. Luke can paint a car in 6 hours so he paints at a rate of ^{1}/_{6} cars per hour. Hence working together they paint at the rate of ^{1}/_{4} + ^{1}/_{6} cars per hour. How long would it take them, working together, to paint one car? Penny 

