Question

На листе белой бумаги прямоугольной формы,длина которого 15см,а ширина 5см,нарисован жёлтый квадрат со стороной 3см.Найди площадь белой части листа.

Answer 1

Площадь листа бумаги 15*5=75 см^2
площадь желтого квадрата 3*3=9 см^2
площадь белой части 75-9=66 см^2

Answer 2

Calculation of the White Area of the Paper

To find the area of the white part of the paper, we need to subtract the area of the yellow square from the total area of the paper.

The length of the rectangular paper is given as 15 cm, and the width is given as 5 cm. Therefore, the total area of the paper can be calculated by multiplying the length and width:

Total Area of the Paper = Length × Width

Total Area of the Paper = 15 cm × 5 cm

Now, let's calculate the area of the yellow square. The yellow square has a side length of 3 cm. The area of a square can be calculated by squaring the length of one side:

Area of the Yellow Square = Side Length × Side Length

Area of the Yellow Square = 3 cm × 3 cm

To find the area of the white part of the paper, we subtract the area of the yellow square from the total area of the paper:

Area of the White Part of the Paper = Total Area of the Paper - Area of the Yellow Square

Now, let's substitute the values and calculate the area of the white part of the paper:

Area of the White Part of the Paper = (15 cm × 5 cm) - (3 cm × 3 cm)

Area of the White Part of the Paper = 75 cm² - 9 cm²

Area of the White Part of the Paper = 66 cm²

Therefore, the area of the white part of the rectangular paper is 66 cm².