Question

Диаметр долгоиграющей пластинки равен 50 см.Найдите длину окружности этой пластинки.Число пи округлите до десятых. Напишите решение.

Answer 1

диаметр- это "дэ"

длина окружности-цэ

цэ=пидэ

 

то есть "цэ" равно 50 умножить на 3,1

Answer 2

Calculation of the Circumference of a Long-playing Record

To find the circumference of a long-playing record with a diameter of 50 cm, we can use the formula for the circumference of a circle, which is given by:

Circumference = π * Diameter

Given that the diameter of the record is 50 cm, we can substitute this value into the formula:

Circumference = π * 50 cm

Now, let's calculate the circumference by rounding the value of π to the nearest tenth.

Using the value of π rounded to the nearest tenth, which is approximately 3.1, we can calculate the circumference as follows:

Circumference = 3.1 * 50 cm

Calculating this expression, we find:

Circumference = 155 cm

Therefore, the length of the circumference of the long-playing record is 155 cm.

Please note that the value of π used in this calculation is an approximation rounded to the nearest tenth. The actual value of π is an irrational number with an infinite number of decimal places.

I hope this helps! Let me know if you have any further questions.