Question

How long does it take to walk 2000 miles?

Answer 1

The time taken by a normal person to walk $2000\text{ miles}$ is approximately $\fbox{\begin\\645.16\text{ hr}\end{minispace}}$ or $\fbox{\begin\\26.88\text{ days}\end{minispace}}$.

Further explanation:

The time taken by a person to cover a distance of $2000\text{ miles}$ depends upon the capability of a person because walking speed varies from person to person. Walking speed also depends upon some parameters like body weight, height and efforts. It is observed that the people who suffered stroke, walks very slow as compared to other normal persons. The average walking speed of human can be taken as $3.1\,{\text{ miles/hr}}$.  

Given:

The distance which has to be covered by a normal person is $2000\text{ miles}$.

Concept:

Speed is defined as the rate at which a person moves or covers a distance per unit time.

Mathematically it can be expressed according the relation given below.

$v=\dfrac{s}{t}$  

Rearrange the above expression for time

$\fbox{\begin\\t=\dfrac{s}{v}\end{minispace}}$                                                                     …… (1)

Here, $v$ is the average speed of a normal person, $s$ is the distance covered by a person and $t$ is the time.

Substitute $2000\text{ miles}$ for $s$ and $3.1\,{\text{miles/hr}}$ for $v$ in the equation (1).

$\begin{aligned}t&=\frac{{2000\,{\text{miles}}}}{{3.1\,{\text{miles/hr}}}} \\&=645.16\,{\text{hr}} \\ \end{aligned}$  

The Time taken by a person can also be expressed in terms of day, twenty four hours in a day makes a day i.e., $\fbox{\begin\\1\text{ day}=24\text{ hr}\end{minispace}}$.

The time taken by a person to cover a distance of $2000\,{\text{miles}}$ in terms of days is:  

$\begin{aligned}t&=\left( {645.16\,{\text{hr}}} \right)\left( {\frac{{1\,{\text{day}}}}{{24\,{\text{hr}}}}} \right) \\&=26.88\,{\text{days}} \\ \end{aligned}$  

Thus, the average time taken by a normal person to walk $2000\text{ miles}$ is approximately $\fbox{\begin\\645.16\text{ hr}\end{minispace}}$ or $\fbox{\begin\\26.88\text{ days}\end{minispace}}$.

Learn more:

1. The motion of a body under friction brainly.com/question/4033012

2. A ball falling under the acceleration due to gravity brainly.com/question/10934170

3. Conservation of energy brainly.com/question/3943029  

Answer Details:

Grade: High school

Subject: Physics

Chapter: Kinematics

Keywords:

Average speed of a normal person, distance, speed, time taken by a person, 2000 miles, 645.16 hr, 645.16 h, 26.88 days, walking speed, parameters on which walking speed of a person depends.

Answer 2

The average human walking speed at crosswalks is about about 3.1 miles per hour (mph) or 5.0 kilometers per hour (km/h).

In order to calculate the time needed to walk 2000 miles, we should divide 2000 with the average speed.

2000 miles / 3.1 miles per hour= 645,161 hours

It takes 645 hours to walk 2000 miles.