Question

The NYC subway system has a total of 850 miles of train tracks, and a NYC subway train has an average speed of 17.4 mph. If you laid all 850 miles of track end-to-end in one big circle, how much time would it take to ride a NYC subway train around the entire circumference of that circle?

Answer 1

Answer:48.85 hr

Step-by-step explanation:

Given

The length of the train track is $L=850\ miles$

the average speed of the train is $v_{avg}=850\ mph$

If this track is laid on to a big circle, then the length is equivalent to the circumference

time is taken to cover the circumference is given by

$\Rightarrow t=\dfrac{L}{v}\\\\\Rightarrow t=\dfrac{850}{17.4}=48.85\ hr$