In 1876 Alexander Graham Bell succeeded in sending the first telephone message 'Mr. Watson, come here I want you'. It's a good thing that Watson was at the other end of the phone and Bell didn't have to ring Directory Assistance. If three operators can answer 120 calls in half an hour, how many operators does it take to handle 560 calls in an hour?
Seven.
3 operators can handle 240 calls in an hour at an average of 80 each per hour. Dividing 80 into 560 calls per your, you need seven operators.
