Question

фотографию прямоугольной формы с размерами 30см и 40см увеличили во много раз для изготовления прямоугольного рекламного щита.Площадь щита 48 кв.м. каковы его длина и ширина?

Answer 1

S(площадь)=a*b (длину умножить на ширину)

S=40х30=1200 кв.см = 12 кв.м

S=(40х2)+(30х2)=4800 кв.см = 48 кв.м

Фотографию увеличили в 2 раза

Ответ: при площади щита 48 кв.м его длина будет 80 см и ширина 60 см

Answer 2

Calculating the Dimensions of the Enlarged Billboard

To calculate the dimensions of the enlarged rectangular billboard, we can use the formula for the area of a rectangle, which is given by:

Area = Length × Width

Given that the area of the billboard is 48 square meters and the original dimensions are 30 cm and 40 cm, we can calculate the dimensions of the enlarged billboard.

Let's proceed with the calculation.

Calculation

First, we convert the original dimensions from centimeters to meters: - Original length = 30 cm = 0.3 m - Original width = 40 cm = 0.4 m

Now, we can use the formula to find the dimensions of the enlarged billboard: - Area = Length × Width - 48 = Length × Width

We need to find the new length and width when the area is 48 square meters.

Solving for the Dimensions

To find the dimensions, we can use the following steps: 1. Divide the area by one of the original dimensions to find the other dimension. 2. Use the obtained dimension to calculate the other dimension.

Let's calculate the dimensions using the given area of 48 square meters and the original dimensions of 0.3 m and 0.4 m.

Result

The length and width of the enlarged billboard are approximately: - Length ≈ 8 m - Width ≈ 6 m

So, the dimensions of the enlarged rectangular billboard are approximately 8 meters in length and 6 meters in width.

This calculation is based on the given area and the original dimensions of the photograph.