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C Program to find Volume and Surface Area of a Cylinder

by suresh

How to write C Program to find Volume and Surface Area of a Cylinder with example?. Before we step into the C Program to find Volume and Surface Area of a Cylinder, Let see the definitions and formulas behind the Surface Area of a Cylinder, Lateral Surface Area, Top, or Bottom Surface Area and Volume of a Cylinder.

C Surface Area of a Cylinder

If we know the radius and height of the cylinder, we can calculate the surface area of a cylinder using the formula:

  • Surface Area of a Cylinder = 2πr² + 2πrh (Where r is radius and h is the height of the cylinder).

The Volume of a Cylinder: The amount of space inside the Cylinder called Volume. If we know the height of a cylinder then we can calculate the volume of a cylinder using the formula:

  • Volume of a Cylinder = πr²h
  • The Lateral Surface Area of a Cylinder = 2πrh
  • We can calculate the Top Or Bottom Surface Area of a Cylinder = πr²

C Program to find Volume and Surface Area of a Cylinder

This C program allows the user to enter the value of a radius and height. Using these values, it will calculate the Volume of a Cylinder, Surface Area of a Cylinder, Lateral Surface Area of a Cylinder, Top Or Bottom Surface Area of a Cylinder as per the formula.

/* C Program to find Volume and Surface Area of a Cylinder */

#include<stdio.h>
#include<math.h> 

int main()
{
  float radius, height;
  // L = Lateral Surface Area of a Cylinder, T = Top Surface Area
  float sa,Volume, L, T;

  printf("\n Please Enter the radius and height of a cylinder \n");
  scanf("%f %f", &radius, &height);

  sa = 2 * M_PI * radius * (radius + height);
  Volume = M_PI * radius * radius * height;
  L = 2 * M_PI * radius * height;
  T = M_PI * radius * radius;

  printf("\n Surface Area of a cylinder = %.2f", sa);
  printf("\n Volume of a Cylinder = %.2f", Volume);
  printf("\n Lateral Surface Area of a cylinder = %.2f", L);
  printf("\n Top OR Bottom Surface Area of a cylinder = %.2f", T);
  
  return 0;
}

NOTE: If you fail to include the C Programming math.h header file, M_PI will throw an error. We can also define pi as a global or local variable and assign value as 3.14.

C Program to find Volume and Surface Area of a Cylinder

In this C Program to find Volume and Surface Area of a Cylinder example, We have entered the radius of a Cylinder = 3 and height = 5

The Surface Area of a Cylinder is
Surface Area of a Cylinder= 2πr² + 2πrh

It can also be written as
Surface Area of a Cylinder = 2πr (r+h)
Surface Area of a Cylinder = 2 * M_PI * radius * (radius + height)
Surface Area of a Cylinder = 2 * 3.14 * 3 * (3+5);
Surface Area of a Cylinder = 150.72

The Volume of a Cylinder is
Volume of a Cylinder = πr²h
Volume of a Cylinder = M_PI * radius * radius * height
Volume of a Cylinder = 3.14 * 3 * 3 * 5
Volume of a Cylinder = 141.3

The Lateral Surface Area of a Cylinder is
L = 2πrh
L = 2 * M_PI * radius * height
L = 2 * 3.14 * 3 * 5
L = 94.2

The Top Or Bottom Surface Area of a Cylinder is
T = πr²
T = M_PI * radius * radius
T = 3.14 * 3 * 3
T = 28.26

NOTE: For the calculation purpose, we have taken π = 3.14 instead of (3.142857142..). So, All the above C program values are almost equal to program output but may differ at 0.01.

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