Mariamaria can shovel snow from her driveway in 4040 minutes. tomtom can do the same job in 3535 minutes. how long would it take mariamaria and tomtom to shovel the driveway if they worked together?
Maria does 1/40th of the driveway per minute. Tom does 1/35th. Together, they do: 1/40+1/35=75/1400=3/56 1/3/56=56/3, or 18&2/3 minutes working together ☺☺☺☺
