A candle is 10 in. tall after burning for 2 hours. After 3 hours, it is 8.5 in. tall. How tall will the candle be after 6 hours?

candle-buring

#1

A candle is 10 in. tall after burning for 2 hours. After 3 hours, it is 8.5 in. tall. How tall will the candle be after 6 hours?

Answer:

Rate= Length(1)- Length (2) divide by time(2)- Time (1)
Rate= (10-8.5)/ (3-2)
Rate= 1.5 in/hr.

Using the same equation, substitute the known factors, giving:
1.5= (8.5-x)/(6-3)
1.5(3)= 8.5- x
8.5- 4.5 = x
x= 4 inches