Lisa wants to cover the top of the lid in beads. She has enough beads to cover 42 square centimeters. Find the area of the lid. Can Lisa cover the top in beads? The PERIMETER IS 30 by 5 CM
So first you do 30 times 5 and you'll get 150. Then you do 150 by 40 and you'll get 3 remainder 75. If your rounding it's 4.