Question

A submarine starts at sea level and descends at a rate of 7 feet per second. What will get the altitude, in feet, of the submarine after 30 seconds

Answer 1

Given data:

The given rate of the submarine is r=7 feet per second.

The given time is t=30 seconds​.

The given expression for the distance is,

$d=r\times t$

Substitute the given values in the above expression.

$\begin{gathered} d=(7\text{ ft/s)(30 s)} \\ =210\text{ ft} \end{gathered}$

Thus, the altitude is 210 feet.