Finding Duration, Start and Finish Time

1. Jimmy boarded a train at 9.35 a.m.
He got off the train at 12.35 p.m.
How long was his train journey?

duration of time
Jimmy's train journey was 3 hours long.

2. What time is 4 hours after 3.10 p.m.?

duration of time
4 hours after 3.10 p.m. is 7.10 p.m.

3. Lana was wrapping return gifts for a party.
She finished wrapping the gifts at 1.35 p.m.
It took her 2 h 25 min to wrap the gifts.
At what time did she start wrapping the gifts?

duration of time
She started wrapping the gifts at 11.10 a.m.