Question

A circle of radius 2.8 cm is cut out from a square
piece of an aluminium sheet of side 10 cm. What is the area of the left over aluminium sheet?
(Take = 3.14)

Answer 1

Answer :

• Area of the left over aluminium sheet is 4.6176 cm²

Given :

• Radius is 2.8cm
• Side is 10cm

To find :

• Area of the left over aluminium sheet

Solution :

Given that,

• Side is 10cm
• Radius is 2.8

According to Question

• The area of the left over aluminium sheet = Area of the square - Area of circle

Where , Area of square is a² (side = 10cm) and area of circle is πr² (Radius = 2.8cm) and also Given 3.14 so,

》 a² - πr²

》(10)² - 3.14 × (2.8)²

》20 - 3.14 × 7.84

》20 - 24.6176

》4.6176 cm²

Hence, Area of the left over aluminium sheet is 4.6176 cm²