Amber worked for 12 hours last weekend. Armand worked one-third as long and Ella worked twice as long. How many hours did the 3 people work in total?
Armand = (1/3) * 12 = <<(1/3)*12=4>>4 hours
Ella = 2 * 12 = <<2*12=24>>24 hours
Total hours = 12 + 4 + 24 = <<12+4+24=40>>40 hours
They worked a total of 40 hours.
#### 40