Question

A submarine descends at a rate of 60 feet per minute. How long will it take to descend to a depth of 900 feet. ?

Answer 1

$Formula\ for\ veolocity:\\\\ velocity=\frac{distance}{time}\\ v=60\frac{feet}{min}\\ distance=900feet\\\\ velocity*time=distance\ \ |Divide\ by\ velocity\\ time=\frac{distance}{velocity}\\ time=\frac{900}{60}=15minute\\\\ \textbf{It\ will\ take\ 15\ minutes.}$