Question

Ширина дачного участка прямунольной формы равна 20 м, длина 30 м. Сколько метров верёвки понадобится, чтобы , натянув её, обозначить границу участка ? Сколько колышков понадобится , чтобы натянуть на них верёвку? Колышки надо вбивать через каждые 2 м 5 дм.

Answer 1

1)(20+30)×2=100(м)- периметр дачного участка, значит столько веревки понадобится.
2)100:2,5=40(кол.)- надо вбить.

Answer 2

Понадобится 100м веревки (P уч.=(30+20)×2) и 40 колышков (100м:2.5м) или (1000дм:25дм=40)

Answer 3

Calculation of Rope Length and Number of Stakes

To determine the length of rope needed to mark the boundaries of the rectangular-shaped plot, we can use the formula for the perimeter of a rectangle, which is given by:

Perimeter = 2 * (Length + Width)

Given that the length of the plot is 30 meters and the width is 20 meters, we can substitute these values into the formula to find the perimeter:

Perimeter = 2 * (30 + 20) = 2 * 50 = 100 meters

Therefore, 100 meters of rope will be needed to mark the boundaries of the plot.

To determine the number of stakes needed to stretch the rope, we need to divide the perimeter by the distance between each stake. In this case, the distance between each stake is given as 2 meters and 5 decimeters (or 2.5 meters).

To calculate the number of stakes, we can use the formula:

Number of Stakes = Perimeter / Distance between Stakes

Substituting the values, we have:

Number of Stakes = 100 meters / 2.5 meters = 40 stakes

Therefore, 40 stakes will be needed to stretch the rope and mark the boundaries of the plot, with each stake placed at a distance of 2 meters and 5 decimeters from the previous stake.

Please note that the calculations provided are based on the assumption that the rope will be stretched along the perimeter of the plot, forming a rectangle.