Question

In a school, lessons are 55 minutes long. a) A maths lesson starts at 9:20am. What time does it end? b) A science lesson ends at 2:15pm. What time does it start?

Answer 1

a- 10:15 b- 1:20

Explanation:

a- there are 40 min remaining in the hour. Subtract that from 55, you get 15. That means the time is 10:15.

b- There are 15 min in the hour, subtract that from 55. You get 40, the time is 1:20

Answer 2

A. It ends at 10:15am

B. It starts at 1:20pm

Explanation:

A. Add an hour then subtract 5 minutes

B. Subtract an hour then add 5 minutes