Question

A circle of radius 4cm is cut from a rectangular aluminium sheet of dimensions 7cm x 9cm. Find the area of remaining sheet (pi= 3.14)​

Answer 1

pier2=3.14×4²

=3.14×16

=50.24

perimeter of aluminum sheet = 7×9

=63cm

area of remaining sheet = 63 - 50.24 cm

=12.76cm

Answer 2

Answer:

If a circle of radius 4cm is cut from a rectangular aluminum sheet of dimensions 7cm x 9cm then the area of the remaining sheet is 12.76 sq. cm.

Step-by-step explanation:

Given:

Radius of circle = 4 cm

Dimension of rectangular sheet = 7cm x 9cm

Find: The area of the remaining sheet

Area of circle = $\pi r^{2}$

Area of rectangle = Length x breadth

Step 1:

First, find the area of a circle

Area of circle = $\pi r^{2}$

= 3.14  x4  x 4

= 50.24 sq. cm

Step 2 :

Now find Area of rectangle =  Length x breadth

= 7cm x 9cm= 63 sq. cm

Remaining area = Area of rectangle - Area of circle

= 63 - 50.24

= 12.76 sq. cm.

Hence the area of remaining sheet 12.76 sq. cm.