Luas & Volume Tabung Method Java

package com.tutorial;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner userInput = new Scanner(System.in);
        float phi = 3.14f;
        float r, tinggi, luasP, volume;

        System.out.println("\t Luas Permukaan & Volume Tabung \n");

        System.out.print("\n Masukkan Jari-jari   : ");
        r = userInput.nextFloat();

        System.out.print(" Masukkan Tinggi        : ");
        tinggi = userInput.nextFloat();

        luasP = luasPermukaan(r, tinggi);
        System.out.print("\n Luas Permukaan : " + luasP);

        volume = volumeTabung(r, tinggi);
        System.out.print("\n Volumenya      : " + volume);
    }

    public static float luasPermukaan(float r, float t) {
        float phi = 3.14f;
        float hasil;

        hasil = 2 * phi * r * (r + t);
        return hasil;
    }

    public static float volumeTabung(float r, float t) {
        float phi = 3.14f;
        float hasil;

        hasil = phi * r * r * t;
        return hasil;
    }
}