Walter, bill, and tom want to decorate the multi-purpose room in school for a dance. it would take walter and bill 4 hours each to do the job and tom alone could do the job in 3 hours. if all work together, how long will it take them to decorate the room?

Number of hours they all will take is

Step-by-step explanation:

Since we have given that

Number of hours Walter and Bill takes to do the job = 4 hours

Number of hours Tom alone takes to do the job = 3 hours

We need to find the number of hours takes them together to decorate the room.

Work done by Walter and Bill =

Work done by Tome =

total work done by three is given by

Hence, Number of hours they all will take is

b

step-by-step explanation:

the word superfluous means unnecessary