Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 5 hours. How much time would it take for them to mow the lawn together?

They could mow the lawn in ? hours if they worked together.
(Simplify your answers.)

Question

Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 5 hours. How much time would it take for them to mow the lawn together?

They could mow the lawn in ? hours if they worked together.
(Simplify your answers.)

ash2326 · Answer

Jack in 1 hour do 1/3 of work
Marilyn in 1 hour do 1/5 of work
together in an hor they will do
1/3+1/5
8/15
so they will togetherly mow the lawn in 15/8 or 1.875 hours