Max can mow a lawn in 45 minutes. Jan takes twice as long to mow the same lawn. If they work together, how long will it take them to mow the lawn?
Max can mow a lawn in 45 minutes. Jan takes twice as long to mow the same lawn. If they work together, how long will it take them to mow the lawn?
Max mows 1/45 of the lawn in one minute.
Jan mows 1/90 of the lawn in one minute.
1/45 + 1/90 =3/90=1/30 of the lawn can be mown by both of them in one minute.
Therefore, it will take them 30 minutes to mow the lawn together.
