Question

A rectangular piece of poster board measures 60 centimeters by 80 centimeters. Linn draws the net of a box on the poster board and cuts it out. If the box measures 10 centimeters by 16 centimeters by 27 centimeters, what is the area of the poster board left?

Answer 1

Area of poster board before cutting it = 60cm x 80cm = 4800cm^2

Total surface area of the box = 2(10cm x 16cm) + 4(27cm x 10cm) = 1400cm^2

Area left = (4800 - 1400)cm^2 = 3400cm^2