**C program for area of a**

**cylinder**

**Formula of surface area of cylinder:**

Surface_area = 2 * Pie * r * (r + h)

**Formula of volume of cylinder:**

Volume = Pie * r * r * h

Pie = 22/7 or
3.14159265358979323846264338327950288419716939937510...

**C code:**

#include<stdio.h>

#include<math.h>

int main(){

float r,h;

float
surface_area,volume;

printf("Enter
size of radius and height of a cylinder : ");

scanf("%f%f",&r,&h);

surface_area
= 2 * M_PI * r * (r + h);

volume
= M_PI * r * r * h;

printf("Surface
area of cylinder is: %.3f",surface_area);

printf("\nVolume
of cylinder is : %.3f",volume);

return 0;

}

**Sample output:**

Enter size of radius and height of a cylinder: 4 10

Surface area of cylinder is: 351.858

Volume of cylinder is: 502.655

7. Write a c program to find the area of rhombus.

8. Write a c program to find the area of parallelogram.