Question

Sunil goes to school at 07:45 a.m. and comes back home at 01:35 p.m. How much time does Sunil spend in school?

Answer 1

Hint: For solving this question, we will convert 01:35 p.m. according to the 24 – hour clock.
There are two ways of telling the time:
The 12 – hour clock runs from 1 a.m. to 12 noon and then from 1 p.m. to 12 midnight.
The 24 – hour clock uses the numbers 00:00 to 23:59 where midnight is 00:00.

Complete step-by-step solution -

12 – HOUR	24 – HOUR	12 – HOUR	24 – HOUR
1 a.m.	01:00	1 p.m.	13:00
2 a.m.	02:00	2 p.m.	14:00
3 a.m.	03:00	3 p.m.	15:00
4 a.m.	04:00	4 p.m.	16:00
5 a.m.	05:00	5 p.m.	17:00
6 a.m.	06:00	6 p.m.	18:00
7 a.m.	07:00	7 p.m.	19:00
8 a.m.	08:00	8 p.m.	20:00
9 a.m.	09:00	9 p.m.	21:00
10 a.m.	10:00	10 p.m.	22:00
11 a.m.	11:00	11 p.m.	23:00
12 a.m.	12:00	12 p.m.	24:00

Let us now solve the question.
Sunil goes to school at = 7:45 a.m.
Sunil comes back home at = 1:35 p.m.
The time he spends in his school = 01:35 − 7:45
                                                                      = 13:35 − 7:45
                                                                     =5:50 hours
     = 5 hours 50 minutes
Thus, Sunil spends 5 hours and 50 minutes in the school.

Note: One must do all the calculations very carefully for solving this question. Also, not only in this question, one must be very careful while doing such questions as if there is any mistake in the calculations, the answer can come out to be wrong.