Question

A 3-inch candle burns down in 6 hours. Assuming the candles are the same thickness and make (that is, directly proportional), how long would it take a 4-inch candle to burn down?

Answer 1

8 hours, 1 inch per 2 hours

6 hours/3 inches = 2 hours/inch

Answer 2

8 hours

Explanation:

You want the burn time of a 4-inch candle, given that a 3-inch candle of the same kind burns for 6 hours.

Proportional

Since the burn time is proportional to the dimension, a 4-inch candle will burn 4/3 times as long as a 3-inch candle.

(4/3)(6 h) = 8 h

The larger candle will burn 8 hours.

<95141404393>