Alec started working on his science fair project at ten o'clock. He worked on it for five hours without stopping. What time was it when Alec stopped working on his science fair project

After school, Anna had a science club meeting for 1 hour and 15 minutes, followed by a choir rehearsal that lasted for 1 hour. If Anna got out of school at 2:15 P.M., what time did the choir rehearsal end?5:00 P.M.4:30 P.M.3:30 P.M.6:30 P.M.Submit

Mr. Chua worked 4 h 15 min in the morning and 5 h 40 min in the afternoon. He had a 1.5-hour lunch in between work. If he left his office at 7.25 p.m. At what time did he start working in his office? Give your answer in 24-hour clock.

At track practice, Tim practiced running the hurdles for 50 minutes. Then he practiced the high jump for 1 hour and 20 minutes. If Tim's track practice ended at 12:55 P.M., what time did it start?

A can do a piece of work in 8 hours. B can do same piece of work in 12 hours. A starts working at 9AM and they worked on alternative hours. At which time work will be finished?

Adam can do a piece of work in 10 days, and Brandon can do the same work in 20 days. With the help of Catty, they finished the work in 4 days. Catty can do the work in how many days, working alone?