1/4 foot every 3/4 hour how many feet in one hour

For this case we propose a rule of three:

foot -------------> hour

x -----------------------------------> 1 hour

Where "x" represents the amount of foot in one hour.

So, we have foot every hour.

foot every hour

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: