Question

from a square cardboard is circle of biggest area was cutted out if the area of circle is 154 cm square calculate the original area of the cardboard

Answer 1

Area of circle = 154 cm square
so radius of circle =7 cm
length of square =2* radius
= 2*7cm
=14 cm
Area of square =14 cm * 14 cm
= 196 cm square

Answer 2

The original area of the cardboard is $1936 cm^2$

Step-by-step explanation:

Area of circle = $\pi r^2$

We are given that the area of circle is 154 cm square

So,  $\pi r^2=154$

$\frac{22}{7} \times  r^2=154$

$r=\sqrt{154 \times \frac{22}{7}}$

$r=22$

So, radius of circle = 22 cm

Diameter of circle = 2r=2(22)=44 cm

from a square cardboard is circle of biggest area was cutted out

So, Side of square = 44 cm

Area of square = $Side^2 = 44^2 = 1936 cm^2$

Hence the original area of the cardboard is $1936 cm^2$

#Learn more:

From a square cardboard of area 196 cm2 ,a circle with biggest area is cut out. Find the area of the remaining cardboard.

https://brainly.in/question/8570827