Chris has a two-speed lawn mower. He can mow his entire lawn in “turtle” mode in 1 hour, or 40 minutes in “rabbit” mode. Today, he experimented by mowing half in turtle mode and half in rabbit mode…👇

Chris has a two-speed lawn mower. He can mow his entire lawn in “turtle” mode in 1 hour, or 40 minutes in “rabbit” mode. Today, he experimented by mowing half in turtle mode and half in rabbit mode. How many minutes did it take him to mow the lawn?