Question

Ratio of radui of 2 circles is 4:5 then the ratio of there areas is ?​

Answer 1

Step-by-step explanation:

A

1

=2πr

1

2

4r

1

=5r

2

r

1

2

A

1

=2π=

r

2

2

A

2

r

1

=

4

5r

2

A

2

A

1

=

r

2

2

r

1

2

=

r

2

2

(

4

5r

2

)

2

=

4

2

5

2

16A

1

=25A

2

∴16:25