Bheja fry question

 This bheja fry question I heard it recently on web radio.

If 3 boys can eat 3 burgers in 3 minutes,

How many burgers will 10 boys eat in 10 minutes ??

ANSWER 

If 3 boys can eat 3 burgers in 3 minutes, then 

1 boy can eat 1 burger in 3 minutes..... 

So, 10 boys can eat 33 1/3 burgers in 10 minutes...