A engine for a car can be manufactured in a factory every 35 minutes. The factory starts production at 8:45 and stops at 16:55.

(i) Find the number of engines that can be produced in a single working day.

I really need help on how to do it!!! Please!!

16:55 - 8:45 = 8:10 = 490 minutes

490 / 35 = ______ engines