Question

The circumference of a circle is 5 centimeters. If the length of the diameter is doubled, which is closest to the new circumference?
A-25 centimeters
B-10 centimeters
C-6 centimeters
D-15 centimeters

Answer 1

Answer:

The Circumference of the circle is

15.7

c

m

and Area is

19.625

c

m

Explanation:

We know that,

Circumference of Circle

=

2

π

r

and

Area of Circle

=

π

r

2

The radius here is 2.5 cm because radius is the half of diameter. The value of

π

is 3.14

Now,

Circumference of Circle:

=

2

⋅

3.14

⋅

2.5

=

6.28

⋅

2.5

=

15.7

c

m

Area of Circle:

=

3.14

⋅

(

2.5

)

2

=

3.14

⋅

6.25

=

19.625

c

m

Answer 2

the answer is 10 centimeter

solution

2πr= 5cm

r =5/2π

=5\2*22/7

5*7/44

=35/44

D =70/44*2

= 35/11

π×d= 22/7*35/11

=10 cm