Chapter 12.4, Problem 41STP

To determine

To find: the number of knots that the person can tie in 25 minutes.

Answer to Problem 41STP

The person can tie G-35 knots in 25 minutes.

Explanation of Solution

Given information:

The person can tie 21 knots in 15 minutes.

Given options-

F-18, G-35, H-36, I-37.

Calculation:

Here, we have to find the number of knots that the person can tie in 25 minutes.

Let $x$ be the number of knots that the person can tie in 25 minutes.

Since, he continues with the same pace, we can write-

  $\begin{array}{l}\frac{x}{25\text{ minutes}}=\frac{21\text{ knots}}{15\text{ minutes}}\\ x=\frac{\left(21\text{ knots}\right)\left(25\text{ minutes}\right)}{\left(15\text{ minutes}\right)}\left[\text{Divide by common factor}\text{.}\right]\\ x=35\text{ knots}\end{array}$

Hence, the person can tie 35 knots in 25 minutes.