Question

If it takes 45 minutes to make 15 chairs how long would it take to make 100 chairs.

Answer 1

45min/15 chair = 3min/chair

so, how long to make 100?

Answer 2

3 hours

Answer 3

no, 3 min/chair * 100 chairs = 300 minutes

That's 5 hours, not 3 hours.