algebra 2 question!?

Question

ok we're doing inverse and joint variations and this is the question:

The force F needed to loosen a bolt with a wrench varies inversely with the length L of the handle. Write an equation relation F and L, given that 250 lbs of force must be exerted to loosen a bolt when using a wrench with a handle 6 inches long. How much force must be exerted when using a wrench with a handle 24 inches long?

Answer 1

This is very easy concept in physics.
F*L = C, where C is a constant to be determined. Since F = 250 (lb) while L = 6 (inch), we have C = 1500 (lb*inch).
Now L = 24 inches, F must be 62.5 lb.