if a ferris well take 45 seconds to make a complete rotation how many rotations will is complete in 3 hours
Hi Jerry;
[(1 rotation)/(45 seconds)][(60 seconds)/(1 minute)][(60 minutes)/(1 hour)]=(x rotations)/(3 hours)
Let's note that the unit of seconds is in the numerator and denominator. It cancels.
Let's note that the unit of minutes is in the denominator and numerator. It cancels.
[(1 rotation)/(45 seconds)][(60 seconds)/(1
minute)][(60 minutes)/(1 hour)]=(x rotations)/(3 hours)
[(1 rotation)/(45)][(60)/(1)][(60)/(1 hour)]=(x rotations)/(3 hours)
The unit of rotations/hour is on both sides of the equation. It cancels...
[(1 rotation)/(45)][(60)/(1)][(60)/(1 hour)]=(x
rotations)/(3 hours)
[(1)/(45)][(60)/(1)][(60)/(1)]=(x)/(3)
(1/45)(60)(60)=x/3
80=x/3
Cross-multiply...
240=x
240 rotations will occur in 3 hours.