Question

Jovie is maintaining a camp fire. She has kept the fire steadily burning for 10 hours with 15 logs. She wants to know how many hours (h) she could have kept the fire going with 9 logs. She assumes all logs are the same. Which proportion could Jovie use to model this situation?

Answer 1

6 hours hope this helps you

Answer 2

10 hours : 15 logs
x hours : 9 logs

15*x = 9*10 => x=9*10/15=6 hours

With n logs, 
x=n*10/15=2n/3 hours where n is the number of logs.