1. The surface area of a cube varies directly as the square of its edge. Find its surface are.

Question

2. A certain object traveling at 24 meters per second has a kinetic energy of 72 joules. If the kinetic energy of that object varies directly as the square of its velocity, find the kinetic energyof that object travelling at 27 m/s.

Our topic here in direct square variation

Answer 1

a = ks^2

E = kv^2
72 = k(24^2)
Now use that k to find

E = k(27^2)

Answer 2

I got it now. Thanks much Steve.