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Volume of Cube

#include < stdio.h >

void main()
{
float a;
float surface_area,volume;

printf("Enter size of any side of a cube : ");
scanf("%f",&a);

surface_area = 6 * (a * a);
volume = a * a * a;

printf("Surface area of cube is: %.3f",surface_area);
printf("\nVolume of cube is : %.3f",volume);
}