Anton wants to wrap a present in a box with the dimensions of 12 cm wide, 5 cm high, and 20 cm long. How much wrapping paper is needed? (SA=2(lw + wh + Ih)).
First, calculate the surface area of the box using the formula SA = 2(lw + wh + lh).
SA = 2(12*5 + 5*20 + 20*12)
SA = 2(60 + 100 + 240)
SA = 2(400)
SA = 800 cm²
Thus, 800 cm² of wrapping paper is needed to wrap the present in the box.