Level 3
Tap A can fill up a tank in 2 hours. Tap B can fill up the same tank in 6 hours. How long will it take to fill up the tank if both taps are turned on at the same time? Express the answer(s) in h.
Level 3
Lorna was in the office from 08 30 to 16 00. She had a 30-min morning break and a 30-min afternoon break. How much time did she spend in the office?