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? and no, its not 1 hour 43 mins.

1.2 hours = 1 hour and 12 minutes.

Step-by-step explanation:

Walter can decorate the multipurpose room in 4 hours.

The part of room decorated by Walter in 1 hour = 1/4

Bill can decorate the multipurpose room in 4 hours.

The part of room decorated by Bill in 1 hour = 1/4.

Tom can decorate the multipurpose room in 3 hours.

The part of room decorated by Tom in 1 hour = 1/3

When they will work together the part of room decorated in 1 hour by all will be:

Let us have a common denominator.

Since together they can decorate 10/12 of the room in 1 hour, so:

Let us convert 0.2 hours into minutes.

Therefore, it will take them 1 hour and 12 minutes to decorate the room.

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

6/20

step-by-step explanation: