is my code is correct or not

Question

#include<stdio.h>

int main (){
float Radius,Length;

printf("Enter the radius and length of a cylinder: ");
scanf("%f %f",&Radius, &Length);

float Area=(Radius*Radius)*3.1415;
printf ("The area is :%.4f \n",Area);

float Volume = Area * Length;
printf("The volume of cylinder is : %.2f", Volume);

return 0;
}

Answer 1

don't forget to include the math header

Answer 2

https://www.khanacademy.org/math/geometry/hs-geo-solids/hs-geo-solids-intro/v/cylinder-volume-and-surface-area