<?php
  abstract class Kujund{
     abstract public function k6rgus();
	 abstract public function p6hjaPindala();
	 public function ruumala(){
	    return $this->k6rgus()*$this->p6hjaPindala();
	 }
  }
  
  class Tikutops extends Kujund{
     public function k6rgus(){return 1.5;}
	 public function p6hjaPindala(){return 10;}
  }
  
  class Tynn extends Kujund{
     private $r, $h;
	 function __construct($r, $h){
	    $this->r=$r;
		$this->h=$h;
	 }
	 public function k6rgus(){return $this->h;}
	 public function p6hjaPindala(){
	    return 3.14*$this->r*$this->r;
	 }
  }
  
  $t=new Tikutops();
  $vaat=new Tynn(15, 40);
  echo $t->ruumala()." ".$vaat->ruumala();
?>