A 29-inch candle burns down in 9 hours. Assuming the candles are the same thickness and make (that is, directly proportional), how long would it take a 3-inch candle to burn down?
Q. A 29-inch candle burns down in 9 hours. Assuming the candles are the same thickness and make (that is, directly proportional), how long would it take a 3-inch candle to burn down?
Given information: We are given that a 4.5-inch candle burns down in 9 hours. We need to find out how long it would take for a 3-inch candle to burn down, assuming the rate of burning is directly proportional to the length of the candle.
Calculate rate: First, we establish the rate at which the 4.5-inch candle burns. We divide the length of the candle by the time it takes to burn down completely.Rate =Time to burnLength of candleRate =9 hours4.5 inches
Calculate rate using values: Now we calculate the rate using the values given. Rate = 9 hours4.5 inches=0.5 inches per hour
Determine time for 3-inch candle: Next, we use the rate to determine how long it will take for a 3-inch candle to burn down. We divide the length of the 3-inch candle by the rate of burning.Time to burn = Length of candle / RateTime to burn = 0.5 inches per hour3 inches
Calculate time for 3-inch candle: Now we calculate the time it would take for the 3-inch candle to burn down.Time to burn = 0.5 inches per hour3 inches=6 hours
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