I need some help please!!!!

Question

The area of a cube varies directly as the square of the length of a side. A cube has an area of 168.54 meters squared when the length of a side is 5.3 meters. What will be the area when the length of a side is 10.2 meters rounded to two decimal places?

Answer 1

Let x = a side of a cube.

Area, A(x) = kx²

k = A/x²=168.64/5.3² = 6 (No surprise, Area of a side is x² and a cube has 6 sides.)

A(x) = 6x²

A(10.2) = 6(10.2)² =624.24 m²