Skipper can mow his lawn in 20 minutes less times with the power mower than with his hand mower. One day the power mower broke down 15 minutes after he started mowing, and he took 25 minutes more time to complete the job with the hand mower. How many minutes does Skipper take to mow the lawn with the power mower?

I wrestled with this question for more than 60 minutes and could not come up with the correct equation. Can someone help me? I dislike the way the question is worded. Do you agree?