Related Rates (differentiating)

In summary, the area of a square is increasing at a rate of 0.8 meter/minute when the side is 3 meters in length. The formula for the area of a square is SA=L^2, where L represents the length of the side.
  • #1
soul5
64
0

Homework Statement


How fast is the area of a square increasing when the side is 3 meters in length and growing at a rate of 0.8meter/minute?


Homework Equations


SA=LW
L=3
dL/dt=0.8

The Attempt at a Solution



I have no clue how to start this and I'm bad at word problems.
 
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  • #2
Wrong formula, find the correct formula and we'll proceed.
 
  • #3
rocomath said:
Wrong formula, find the correct formula and we'll proceed.

It's not really wrong, if it's square then just set W=L. So SA=L^2. Now we can proceed, right?
 
  • #4
Dick said:
It's not really wrong, if it's square then just set W=L. So SA=L^2. Now we can proceed, right?
Eh, I can somewhat agree ... but I still assume OP didn't realize W=L :p (noticing in the post, L=3)
 

FAQ: Related Rates (differentiating)

1. What is the concept of related rates and why is it important in science?

The concept of related rates is a mathematical technique used to find the rate of change of one variable with respect to another variable in a given scenario. It is important in science because many real-world problems involve multiple variables that are constantly changing, and related rates allow us to analyze and understand these changes.

2. How does one differentiate related rates?

To differentiate related rates, we use the chain rule of differentiation. This involves taking the derivative of each variable with respect to time and setting up an equation that relates the rates of change of the variables. Then, we solve for the desired rate of change.

3. What are some common examples of problems that involve related rates?

Some common examples of problems that involve related rates include rates of change of geometric figures (such as the volume of a cone), rates of change of physical quantities (such as velocity and acceleration), and rates of change in real-world scenarios (such as the melting rate of an ice cube).

4. How do you know when to use related rates in a problem?

To know when to use related rates, you should identify if the problem involves multiple variables that are changing with respect to time. If so, then related rates can be used to find the rate of change of one variable in terms of the rate of change of another variable.

5. Can related rates be used in any type of problem?

No, related rates can only be used in problems where the variables are changing with respect to time. If the problem involves constant variables, then related rates cannot be used and another method of differentiation must be applied.

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