Mathematics for IGCSE & O level - Time (Section 2 - No. 46)
A digital recorder starts recording at 15:20 and stops at 17:10. How long was the recording?
2 hours 10 minutes
1 hour 50 minutes
1 hour 40 minutes
2 hours
คำอธิบาย
Subtract the start time from the end time: 17:10 - 15:20 = 1 hour and 50 minutes.