Question

the areas of two watch dace have a raito of 16:25
A) Area= 4pi cm^2
what iis the raito of the radius of the smaller watch face to larger watch face
B) what is the radius of the larger watch face

Answer 1

Answer:

Explanation:

A

1

:

A

2

=

16

:

25

A

=

π

r

2

⇒

π

r

2

1

:

π

r

2

2

=

16

:

25

⇒

π

r

2

1

π

r

2

2

=

16

25

⇒

r

2

1

r

2

2

=

4

2

5

2

⇒

r

1

r

2

=

4

5

⇒

r

1

:

r

2

=

4

:

5

⇒

r

2

=

5