Problema Solution
The surface area A of a cube varies directly as the square of the length e of the
edge of the cube. If the area is 37.5 cm2 when the edge is 2.5 cm, what is the
area when the edge is 3 cm?
Answer provided by our tutors
2.5^2 / 37.5 = 3^2 / x
x = (37.5*3^2)/(2.5^2)
x = 54 cm2