MATHCOUNTS preparation memes

2. Loc can meow his entire lawn in 20 minutes; Loc's roommate Reza needs 30 minutes to meow the entire lawn. If Loc starts meowing at 1 p.m., meows for five minutes and then Reza starts to help with his own meower, at what time will they finish meowing the lawn?

MATHCOUNTS National p.2 team 2007

"Bye bye, meow meow" 

(A) 1:14 PM