Question

ширина прямоугольника равна 8 3/10 см длина на 2 1/10 см больше ширины найди периметр прямоугольника ответ запиши с несократимой дробной частью​

Answer 1

Ответ:

14 1/5

Пошаговое объяснение:

83/10-21/10=62/10

83/10+62/10=145/10=14 1/5

Answer 2

Problem Analysis

We are given the width of a rectangle as 8 3/10 cm and the length as 2 1/10 cm more than the width. We need to find the perimeter of the rectangle and write the answer as an irreducible fraction.

Calculation

To find the perimeter of a rectangle, we need to add the lengths of all four sides. Since the length of the rectangle is given as 2 1/10 cm more than the width, we can calculate the length as follows:

Length = Width + 2 1/10 cm

Now, we can substitute the given values to find the length and calculate the perimeter.

Solution

Given: Width = 8 3/10 cm

Length = Width + 2 1/10 cm

To find the perimeter, we need to add the lengths of all four sides:

Perimeter = 2 * (Length + Width)

Let's calculate the length first:

Length = 8 3/10 cm + 2 1/10 cm

To add the fractions, we need to find a common denominator. The common denominator for 10 and 1 is 10. So, we can rewrite the fractions as follows:

Length = 8 3/10 cm + 2 1/10 cm = 8 3/10 cm + 2 10/10 cm = 8 3/10 cm + 20/10 cm = (8 * 10 + 3)/10 cm + 20/10 cm = 83/10 cm + 20/10 cm = (83 + 20)/10 cm = 103/10 cm

Now, let's calculate the perimeter:

Perimeter = 2 * (Length + Width) = 2 * (103/10 cm + 8 3/10 cm) = 2 * (103/10 cm + 83/10 cm) = 2 * (186/10 cm) = 2 * 18.6 cm = 37.2 cm

Therefore, the perimeter of the rectangle is 37.2 cm.