How to solve direct and indirect/inverse variation problem?
I am having trouble with the following problem in my math course. Can anyone help with explaining this?
The electrical resistance of a wire varies directly as its length and inversely as the SQUARE of its diameter. If a wire with a length of 100 cm and a diameter of 2 mm has a resistance of 1.5 Ohms, find the resistance of a wire with a length of 300 cm and a diameter of 3 mm.