Question

A circle of radius 3 cm is cut out from a square piece of cardboard sheet of side 7 cm. What is the area of the
remaining sheet​

Answer 1

Answer:

Area of square- =7^2 = 49cm2

Area of circle=πr^2 = 3,14x3^2

= 28.26cm2

Remaining area=49-28.26=20.74cm2.

Answer 2

The area of the remaining sheet​ is 20.71 sq. cm.

Explanation:

Given : Side-length of square piece of cardboard sheet = 7cm

Area of of cardboard sheet  = (side)²

Area of of cardboard sheet  = (7)² = 49 sq. cm

Radius of circle = 3 cm

Area of circle = $\pi r^2$ , where r = radius of circle

Then, Area of circle = $\dfrac{22}{7}\times(3)^2=28.29\ cm^2$

Area of the  remaining sheet​ = Area of of cardboard sheet - Area of circle

= 49 - 28.29 =20.71 sq. cm

Hence, the area of the remaining sheet​ is 20.71 sq. cm.

# Learn more :

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

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