Mathematics for IGCSE & O level - Time (Section 1 - No. 36)
Sam set his oven to switch on at 3.45 p.m. and switch off at 6.20 p.m. How long was the oven on?
2 hours 45 minutes
2 hours 35 minutes
3 hours 45 minutes
3 hours 25 minutes
설명
From 3:45 to 4:00 is 15 minutes. From 4:00 to 6:00 is 2 hours. From 6:00 to 6:20 is 20 minutes. So the total time is 2 hours 35 minutes.