Question

At Kanpur, the time of sunrise and sunset on different dates in the year 2011 were as under:

Date	Sunrise	Sunset
10th January	5:00 a.m.	5:30 p.m.
28th March	5:30 a.m.	6:00 p.m.
15th September	5:50 a.m.	6:20 p.m.
20th June	6:30 a.m.	7:00 p.m.

Find the length of the day time for each day.

Answer 1

First convert the time from 12-hour format to 24 hour format.
For the 10th January,
Sunrise = 5:00 a.m = 5:00 hours
Sunset = 5:30 p.m = 17:30 hours
Length of day time on 10th January = 17:30 hours - 5:00 hours = 12 hours 30 minutes.

For 28th March,
Sunrise = 5:30 a.m = 5:30 hours
Sunset = 6:00 p.m = 18:00 hours
Length of day time on 28th March = 18:00 hours - 5:30 hours = 12 hours 30 minutes

For the 15th September,
Sunrise = 5:50 a.m = 5:50 hours
Sunset = 6:20 p.m =18:20 hours
Length of day time on 15th September = 18:20 hours - 5:50 hours = 12 hours 30 minutes

For the 20th June,
Sunrise = 6:30 a.m = 6:30 hours
Sunset = 7:00 p.m = 19:00 hours
Length of day time on 20th June = 19:00 hours - 6:30 hours = 12 hours 30 minutes