Question

Lessons are 55 mins

long. A history lesson
ends at 3:30pm
what time did it
start?
ive been finding it rlly difficult pls can someone explain it in depth?

Answer 1

The history class started at 2:35 pm

Explanation:

To find the before time or starting time, we need to subtract 55 min from 3:30.

We cannot subtract 55 min from 30 min.

1 hour = 60 minutes. 3 : 30 can be written as 2: 90 minutes

Now subtract,

2 : 90

- : 55

2 : 35

The history class started at 2:35 pm