One Day , Mammu set a very interesting problem to me. She pushed a large circular table we have at home , into the corner of the room , so that it touched both walls and spilled a spot of ink on the extreme edge, and she said , " Mummy here is a littlie puzzle for you. Look at that spot. It is 8 inches form one wall and 9 inches form the other. Now tell me what is the diameter of the table without measuting it...."
can you ?