Math, asked by kanchandevi4476, 16 days ago

The diameter of two circles are 3.5 CM and 6cm. find the ratio of the area of a large circle to that of the smaller circle. ​

Answers

Answered by rehanna0911
3

Answer:

Given:

The diameters of two circles are 3.5cm and 6cm.

To find:

Ratio of the area of a large circle to that of the smaller circle.

Solution:

Area of circle = πr²

The ratio of the area of the larger circle to that of the smaller circle = π(6)²/π(3.5)²

= 144/49

The ratio of the area of a large circle to that of the smaller circle = 144:49

_____________________

Hope it helps you!!

:)

Answered by itzmecutejennei
0

Answer:

Correct option is A)

We know the area of a circle =πr

2

Hence, area of a circle(C

1

) of radius 3 m=

7

22

×(3)

2

Area of a circle(C

2

) of radius 4 m=

7

22

×(4)

2

Given, area of big circle = sum of the areas of circles C

1

and C

2

=

7

22

×3

2

+

7

22

×4

2

=

7

22

×(9+16)

=

7

22

×(25)

Let the radius of the big circle be R.

Area of big circle =πR

2

=

7

22

×(25)

⇒R

2

=25

⇒R=5 m

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