Question

A supermarket opens at 7:30am. It stays open for 14 hrs 30 minutes each day. At what time supermarket close?

Answer 1

Okay so it opens at 7:30 am

7:30 + :30 = 8:00

Now you can either count every hour or go by the 24- hour clock

8:00 + 14: 00 = 22:00 
Which equals 10 pm

You can also go by what you know; (In clock terms)
 8 + 4 = 12
12 + 1 = 1
1 + 9 = 10 

Answer 2

The supermarket closes at 10:00 p.m