Jack usually mows his lawn in 6 hours. Marilyn can mow the same yard in 4 hours. How mch time would it take for them to mow the lawn together?

IN one Hour if they work together can mpw

=1/6+1/4.

=2+3/12 =5/12

NUmber of days required =12/5=2.4H.

=2H 24M.