Answer :
If Walt paints 25 ft. on one hour, and Joe pairs 35 ft in an hour, then they paint 60 ft per hour together. So, 60ft divided into the 150 ft fence equals 2 1/2 hours.
It will take Walt & Joe 2 1/2 hours to paint a 150ft fence.
It will take Walt & Joe 2 1/2 hours to paint a 150ft fence.