Question

traveling at 45 mph, how many minutes, rounded to the nearest whole number, does it take to drive 240 miles from Orlando to Miami?

Answer 1

m= miles   s=speed (MPH)    m/s=miles  240/45=5.333 hours

  Hours * minutes in an hour   5.33 * 60= 319.8

The answer is 320 minutes.     

Answer 2

$v=\frac{d}{t}\\\\v-velocity;\ d-distance;\ t-time\\-------------------------\\v=\frac{d}{t}\ \ \ \ |multiply\ both\ sides\ by\ t\\vt=d\ \ \ \ |divide\ both\ sides\ by\ v\\\\t=\frac{d}{v}\\------------------------$

$v=45\ mph;\ d=240\ mi\\\\t=\frac{240}{45}=\frac{240:15}{45:15}=\frac{16}{3}\ (h)\\\\1h=60min\\\\therefore\\\\t=\frac{16}{3}\cdot60min=16\cdot20min=\boxed{320min}$