Question

Lawrence needs to be at his job by 5:00 p.m.
It takes him 20 minutes to ride his bike to his job, 30 minutes to eat dinner, and 45 minutes to do his homework.
Which time does he need to start his homework?

(1 point)

Answer 1

To figure out when Lawrence needs to start his homework, we need to work backward from when he needs to be at his job by 5:00 p.m.

If it takes Lawrence 20 minutes to ride his bike to his job, he needs to leave at 4:40 p.m. in order to arrive on time.

After his bike ride, he needs to eat dinner (30 minutes), so he needs to finish eating by 5:10 p.m.

After dinner, Lawrence needs to do his homework, which takes 45 minutes. Therefore, Lawrence needs to start his homework by 4:25 p.m. in order to finish by 5:10 p.m. and be ready for work.