# How do you find the rate of change of a volume of a cube?

## How do you find the rate of change of a volume of a cube?

The volume of the cube is: V = s^3. The rate of change in volume is dV/dt. The question is asking for the rate that the side length is changing. That would be ds/dt.

### How do you find the rate of change of volume?

To find the rate of change of volume you have to take the derivative of the volume function with respect to r. dV/dr = 4(pi)r^2. Let r = 2. dV/dr = 16(pi).

#### How do you write a cube formula?

A cube has 6 equal faces, and all the faces are square-shaped. It has 8 vertices and 12 equal edges. The below figure represents a cube, where l is length, b is the breadth, and h is height and l = b = h….

Sr.No Cube Cuboid
10 Volume = (edge)³ Volume = l × b × h where,l = length, b = breadth and h = height

What is related rates in calculus?

In differential calculus, related rates problems involve finding a rate at which a quantity changes by relating that quantity to other quantities whose rates of change are known. The rate of change is usually with respect to time.

Why are related rates called related rates?

This is the core of our solution: by relating the quantities (i.e. A and r) we were able to relate their rates (i.e. A′ and r′ ) through differentiation. This is why these problems are called “related rates”!

## Why is the surface area of a cube not the derivative of the volume?

How about a cube with volume V=x^3? In this case the derivative is 3x^2 so it is not the surface area. Why is this? It is due to symmetry i.e. it depends on whether the volume increases symmetrically when you increase your variable such as length of side, radius, or height, etc.

### How do you derive the volume of a cuboid?

Volume of Cuboid Formula

1. Volume of cuboid = Base area × Height [Cubic units]
2. Volume of a cuboid = length × breadth × height [cubic units]
3. Volume of a cuboid = l × b × h [cubic units]
4. Volume of cube: Cuboid in which length of each edge is equal is known as a cube.

#### How do you find the volume of a cube?

The picture for this problem is relatively simple: The volume of any box is given by (length * width * height). For a cube, these are all the same quantity, so we have Note the use of the Chain Rule for the right hand side. Now, the question asks for the value of specifically when , so the answer is: Don’t forget the units!

What is the rate at which the edges of a cube?

The edges of a cube are expanding at a rate of 6 centimeters per second. How fast is the volume changing when each edge is 2 centimeters? If we let denote the length of an edge of a cube at time , then we can write . This is the known information.

How is the rate of change in volume related to radius?

Differentiating both sides of this equation with respect to time and applying the chain rule, we see that the rate of change in the volume is related to the rate of change in the radius by the equation V′ (t) = 4π[r(t)]2r ′ (t).

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