Chapter 12.6, Problem 47CCR

To determine

To compare: The ascent rate of the submarine than the descent rate.

Answer to Problem 47CCR

The ascent rate of the submarine is $235\text{ft/min}$ faster than the descent rate.

Explanation of Solution

Given Information:

The submarine descended 1120 feet in 4 minutes and ascended 1545 feet in 3 minutes.

Calculation:

Calculate the descended rate of the submarine.

  $\begin{array}{c}\text{Descended}\text{rate}=\frac{1120}{4}\\ =280\text{ft/min}\end{array}$

Calculate the ascended rate of the submarine.

  $\begin{array}{c}\text{Aescended}\text{rate}=\frac{1545}{3}\\ =515\text{ft/min}\end{array}$

From the above, it is clear that the difference between the rate is $515\text{ft/min}-280\text{ft/min}=235\text{ft/min}$ .

Conclusion:

Therefore, the ascent rate of the submarine is $235\text{ft/min}$ faster than the descent rate.