Question

Три улицы города освещают 75 фонарей. На первой улице 18 фонорей , на второй улице фонорей в 2 раза больше,чем на первой. Сколько фонорей на третьей улице?

Answer 1

18*2=36
75-36=39

Ответ:39 фонарей

Answer 2

18+18*2=54
75-54=21
Ответ 21

Answer 3

Calculation of the Number of Streetlights on the Third Street

To determine the number of streetlights on the third street, we need to analyze the information provided about the first and second streets.

According to the given information: - The first street has 18 streetlights. - The second street has twice as many streetlights as the first street.

To find the number of streetlights on the second street, we can multiply the number of streetlights on the first street by 2: Number of streetlights on the second street = 18 * 2 = 36.

Now, we know that the total number of streetlights on the first and second streets is 75: Total number of streetlights on the first and second streets = 18 + 36 = 54.

To find the number of streetlights on the third street, we subtract the total number of streetlights on the first and second streets from the total number of streetlights: Number of streetlights on the third street = 75 - 54 = 21.

Therefore, there are 21 streetlights on the third street.