Question

Every 60 minutes the world population increases by 100,000 people. How many people will be born in the next 480 minutes?

Answer 1

480/60 so about 800k

Answer 2

60 minutes= 1 hour, so every hour 100,000 people.
480 minutes= 6 hours, so after 6 hours 6×100,000 = 600,000