Question

A wire is used t form a circle with diameter 35mm.The wire is also used in making 5 diameters which divide the circle into 10 equal sectors Find 1. the total length of wire used 2.the area of each sector

Answer 1

@ganeshie8
@Sadworld

Answer 2

@sarahjane116

Answer 3

@butterflydreamer

Answer 4

correction total length of wire \((C_1+5(2r_2))\)

Answer 5

35mm - circumference of circle
what is the diameter of the 35 mm circle? hint : C=Pi(diameter) or C = 2(pi)r

35/pi=diam

(5*diam) + 35 = length of wire

Answer 6

17.5 times 5 plus 35?

Answer 7

@zpupster 35mm is the diameter given -.-

Answer 8

im really confused :(

Answer 9

@mathmath333

Answer 10

let the length of wire be divide in two parts \(x_1~and ~
x_2\)

the first part is used to form form a circle with diameter 35mm \((d_1=35)\)

so it is equal to its circumference so
\(x=\pi d_1=35\pi\)

first see if it makes sense

Answer 11

i mean \(x_1=35\pi\)

Answer 12

area of the circle is 110?

Answer 13

how ?

Answer 14

sorry i meant circumference = 110

Answer 15

yes

Answer 16

now?

Answer 17

also the wire is used in making 5 diameters which divide the circle into 10 equal sectors

let area of each sector be \(A\) so
\(\large A_s=\dfrac{area ~of ~circle}{10}\\
=\dfrac{\pi (d_1/2)^2}{10}\\\)

Answer 18

also \(x_2=5\times d_1\)

so \(total ~wire=x_1+5\times d_1\)

Answer 19

see if the answer matches with book

Answer 20

area of each sector?

Answer 21

@zpupster 35mm is the length of diameter given

Answer 22

AREA OF EACH SECTOR?
AREA OF CIRCLE?
IM SO CONFUSED!!!!!!

Answer 23

sorry

Answer 24

its ok @zpupster

lol, calm down @AaronAndyson
and please read my reference

Answer 25

yet me confused

Answer 26

which part ?

Answer 27

is it 22/7*17.5*17.5?

Answer 28

for the full circle

Answer 29

yes

Answer 30

9625?

Answer 31

its comming \(962.1\) for me

Answer 32

area of full circle ^

Answer 33

so \(96.21\) area of each sector

Answer 34

back of the book says 96.25

Answer 35

lol its \(\approx\) approximate

Answer 36

that difference comes because the exact value of \(\pi\) is not \(22/7\) its \(3.14...............\)

Answer 37

?????????????????????????????????????????

Answer 38

forgot that lol , any doubt still ?

Answer 39

more questions

Answer 40

sry have to go , but when i come i will have a look at it , good luck