Question

From a circular sheet of of radius 10 cm a circle of radius 4 cm is removed. Find the area of remaining sheet

Take pi as- 3.14

Answer 1

Answer:

The area of the circular sheet with 4cm radius is,

A=πr

2

=16π

The area of the circular sheet with 3cm radius is,

A=πr

2

=9π

Since the circle with radius 3cm is removed, then the remaining area is,

A=16π−9π

=7π

=7×3.14

=21.98cm

2

Answer 2

Answer:

Area of remaining sheet is 264sq.cm.

Step-by-step explanation:

Given that

Radius of circular sheet is 10cm

Radius of circle is 4cm

To find

Area of remaining sheet

Solution

As per given statement area of circle is removed by area of circular sheet

as

$area \: of \: circular \: sheet = \pi \times {10}^{2}$

$area \: of \: circular \: sheet = 3.14 \times 100 \\ = 314.159 {cm}^{2}$

now

$area \: of \: circle = \pi \times {4}^{2}$

$area \: of \: circle = 3.14 \times {4}^{2} \\ =50.24 {cm}^{2}$

now

$area \: of \: remaining \: sheet = 314.159 - 50.24$

hence by subtraction

$area \: of \: remaining \: sheet = 264 {cm}^{2}$