A cinema screening starts at 19:45. The whole screening, including a 10-minute advert break at the start, lasts 2 hours 35 minutes in total. The screen room must then be left empty for at least 20 minutes to be cleaned before the next screening, which starts at 22:40.
(a)Work out the time at which this screening finishes.
You may get a mark for using a correct method even if your answer is incorrect.(2)
(b)Work out whether there is enough time to clean the screen room before the next screening starts at 22:40. Show your working.
You may get a mark for using a correct method even if your answer is incorrect.(2)
(Total for Question 22 is 4 marks)