Question

1. radius of 60 m

3,600m pie m2
7,200m pie m^2
14,400m pie m^2
1,800m pie m^2

2.diameter of 14 cm

784m pie cm^2
196m pie cm^2
28m piecm^2
98m pie cm^2

Answer 1

1. The answer is 3600m(pie) M^2

Answer 2

how'd you get it?

Answer 3

The formula for area of a circle is (pie)r^2

Answer 4

What exactly d'you have to get?

Answer 5

Shes not giving that much info but it seems like a circle. @Aditi_Singh

Answer 6

Because she says radius and the answer is some M^2

Answer 7

Haha :P @zerosniper123 : Nice point :P I kinda thought the same :P

Answer 8

@vivianrush I will draw a picture for you give me a second. lol and yeah nice @Aditi_Singh :P

Answer 9

Find the surface area of the sphere with the given dimension. Leave your answer in terms of pie.

Answer 10

Ahhhh okay then that changes things a lot :P

Answer 11

Well not a whole lot...Its the same concept but we just use a different formula.

Answer 12

If you wanna find the surface area you will use the formula..."4(pi)r^2"

Answer 13

So put 60 back in place of r and then you have 4(pi)(60)^2. :)

Answer 14

Then do some basic math...and 60x60 = 3600 then times that by 4 and you get 14,400.

Answer 15

You have to remember we still have (Pi) so your answer will be....14,400(Pi) m^2

Answer 16

Make sense? :)

Answer 17

yes it does

Answer 18

Shweet! :) Lol and if the second problem is the same, then all you have to do is divide the diameter by 2 and then you have the radius and solve it like we did the first problem. :)

Answer 19

i did that i got 1230.88 and its not right

Answer 20

Hmm...what does the problem ask?

Answer 21

i did it like you told me too and i got that. i don't think i did it right

Answer 22

lol no I think the problem might be asking for something else, do they say they want the surface area of that sphere to?

Answer 23

Find the surface area of the sphere with the given dimension. Leave your answer in terms of pie. just say that

Answer 24

i did 14 * 14 on got 196

Answer 25

Ohhh lol okay I see what you did wrong.. Lol you must have not read my last post. I said that since this problem has a diameter not the radius you need to change it into radius.

Answer 26

The way we do this is divide the diameter by 2.

Answer 27

So take 14 divide it by 2 and you get 7...Then you put it back into the formula 4(pi)r^2

Answer 28

And you have 7x7 which equals 49 and then times that by 4 and it equals 196. :)

Answer 29

You have to remember we still have (Pi) so your answer will be....196(Pi) cm^2

Answer 30

And thats all! :)