Question

After leaving from office, Rishi reaches his home at 19:00 while Anya reaches home at 7:30 pm. By how many minutes, does their timings differ?

• A. 10 mins
• B. 20 mins
• C. 30 mins
• D. 40mins

Answer 1

The correct option is C 30 mins

For an hour after 12 pm, to convert the time from 24-hour format to 12- hour format, we have to subtract it by 12.
i.e., 19:00-12:00=7:00
i.e., 19:00 in 12-hour format is 07:00 pm.

So, the difference in their timings is calculated as:
$\begin{array}{cc}\text{hours}\text{mins}& \\ 730& \\ \underset{–}{-700}& \\ 030& \end{array}$

Thus, their timings differ by 30 minutes.