Question

Свеча длиной 72 см сгорает за одни сутки. Такую свечу решили приспособить для огненных часов. На каком расстоянии одно от другого нужно сделать на ней деления, так чтобы за 10 минут она укорачивалась ровно на одно деление? Дайте ответ в миллиметрах.

Answer 1

Переведем 72 см в милиметры
72*10=720 мм длина свечи
Т.к. в сутках 1440 минут, а одно деление должно быть равно 10 минутам, то
1440/10= 144 деления надо на свече.
Теперь разделим длинну свечи на количество делений
720/144=5 мм.
Ответ 5мм должно быть деление чтобы оно сгорало за 10 минут.

Answer 2

Problem Analysis

We are given a candle that is 72 cm long and burns completely in 24 hours. We need to determine the distance between markings on the candle so that it shortens by one marking every 10 minutes.

Solution

To solve this problem, we need to find the rate at which the candle burns and then calculate the distance between markings based on that rate.

Let's start by finding the rate at which the candle burns. We know that the candle burns completely in 24 hours, which is equivalent to 1440 minutes. Therefore, the candle burns at a rate of 72 cm / 1440 min = 0.05 cm/min.

Now, we need to determine the distance between markings on the candle so that it shortens by one marking every 10 minutes. Since the candle burns at a rate of 0.05 cm/min, it will burn 0.05 cm/min * 10 min = 0.5 cm in 10 minutes.

Therefore, the distance between markings on the candle should be 0.5 cm.

Answer

To ensure that the candle shortens by one marking every 10 minutes, the distance between markings on the candle should be 0.5 cm.

Please note that the answer is provided in centimeters, as the question did not specify the unit of measurement.