#include <iostream>
#include <cmath>
#include <windows.h>

float area (int h,float Pi=3.14,float R=0.4)
{
	float S;
	S = 2*Pi*R*h+2*Pi*R*R;

	return S;
}

float fNumber(int n,float h1)
{
	return area(h1)*n;
}

int main()
{
	std :: cout << fNumber(10,1)+ fNumber(15,0.9) + fNumber(20,0.7)
				<< std :: endl;

	system ("pause");
	return 0;
}