Question

A Science class begins at 1:30 p.m and ends at 3:00 p.m. How many minutes long is the Science class?

Answer 1

90 min

Explanation:

3h=180 min

1h and 30min=90min

3h-1h and 30min=180min-90min=90

Answer 2

90 minutes long

1 hour, 30 minutes

Explanation:

The science class begun 1:30pm and ends 3:00pm

An hour is 60minutes.

Between 1:30pm and 2:00pm is 30minutes.

And from 2:00pm to 3:00pm is an hour, that is 60minutes

We therefore have 30minutes+60 minutes=90 minutes long.

We can also say an hour, 30 minutes