curtis can unload a truckload of hay in 30 minutes, but it takes ronnie 40 minutes to do the same. Working together, how many minutes will it take them to unload 35 truckloads of hay?
First, let's find out how much hay each person unloads in one minute.
Curtis unloads 1 truckload of hay in 30 minutes, so he unloads 1/30 of a truckload in one minute.
Ronnie unloads 1 truckload of hay in 40 minutes, so he unloads 1/40 of a truckload in one minute.
Working together, Curtis and Ronnie can unload (1/30 + 1/40) = 7/120 of a truckload in one minute.
To unload 35 truckloads of hay, it will take them (35 / (7/120)) = 600 minutes to unload all the hay together.
Therefore, it will take them 600 minutes to unload 35 truckloads of hay working together.