Question

The difference between the circumference and the radius of a circle is 37 cm.The area of the circle is........................

Answer 1

\[Circumference = 2 \pi .r\]

\[2 \pi r - r = 37\]

\[r(2 \pi - 1) = 37\]

Solve for r here by putting pi = 3.14

Then the value of r you will put into the formula below to find the area:


\[Area = \pi.r^2\]

Answer 2

r(2*pi-1)=37
r(2*3.14-1)=37
r*5.28=37
is the process correct?

Answer 3

Yes you are going right..

find r from it..

Answer 4

Divide by 5.28 both the sides..
can you do it or not?

Answer 5

i try.

Answer 6

Take your time..

Answer 7

7 ?

Answer 8

radius=7?

Answer 9

Yes you got it..

now for simplicity put in area the value of pi as 22/7 and not 3.14

Getting??

Answer 10

yeah!

Answer 11

154cmsq.

Answer 12

Yes dear...

Answer 13

hey if u don't have any prob. can i ask u one more ques.?

Answer 14

Sure I will see what can I do in that..

Answer 15

The inner and the outer radii of a cylindrical pipe are 5cm and 4cm respectively.Find the area of cross section of the pipe(Take pi=3.14).

Answer 16

wat happen?
is it hard?

Answer 17

I don't know the formula for area of cross section of pipe..
Do you know?

Answer 18

no

Answer 19

Try this one if I am thinking right:

\[Area = \pi .(R - r)^2\]

R = Outer Radius..
r = Inner Radius..

Answer 20

Able to do or not??

Answer 21

pi*(5-4)sq.
like this?

Answer 22

Yes solve it and check if the answer is coming right or not?

Answer 23

Area simply becomes equal to pi, I think...

Answer 24

yes!

Answer 25

Is the answer right?

Answer 26

i am asking u!

Answer 27

Don't you have the answers with you??

Answer 28

i am making an answer key!!!

Answer 29

So, you should post this question so that the answer can be confirmed..

Answer 30

i've already bumped it!