<?php
  include_once("pystkujund.php");
  class Silinder extends Pystkujund{
     private $r, $h;
     function __construct($r, $h){
        $this->r=$r; $this->h=$h;
     }
     function pohjaPindala(){
        return 3.14*$this->r*$this->r;
     }
     function korgus(){
        return $this->h;
     }
  }