Question

Paul can mow grass in 50 minutes, but it takes Dan three times as long. How long will it take them to mow the grass if they work together?

Answer 1

hey!

Answer: Paul does 1/50 of the job per minute.

3 times longer is 150 minutes longer = 200 minutes

Dan does 1/200 per minute.

Together, they do 1/50 + 1/200 per minte = 1/40 per minute

--> 40 minutes

Hope this helps!!

~LENA~