Question

Помогите пожалуйста ,решить задачу.С решениям и пояснением. Длина экватора Луны приближенно равна 10,9 тыс.км.Чему равен диаметр Луны?(Результат округлите до сотен километров.)

Answer 1

Длина окружности L=2пr
 10.9=2*3.14*r
10.9=6.28*r
r= 10.9:6,28=1,736≈1,74 тыс. км  радиус луны.   
 
диаметр D=2*r     D=2*1.74=3.48 тыс.км

Answer 2

Calculation of the Moon's Diameter

To calculate the diameter of the Moon, we can use the formula for the circumference of a circle, which is given by:

C = 2πr

where C is the circumference and r is the radius of the circle.

Given that the length of the Moon's equator is approximately 10,900 kilometers, we can use this information to find the radius of the Moon.

C = 2πr

10,900 = 2πr

To find the radius, we can rearrange the equation:

r = C / (2π)

Substituting the given value for the circumference:

r = 10,900 / (2π)

Now, to find the diameter, we can multiply the radius by 2:

d = 2r

Let's calculate the diameter using the given information:

r = 10,900 / (2π) ≈ 1737.5 kilometers

d = 2 * 1737.5 ≈ 3475 kilometers

Therefore, the diameter of the Moon is approximately 3475 kilometers.

Please note that the above calculation is an approximation and may not be completely accurate.