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@RadEn
17 ?
yes
just multiply by 4, it is 4 * 12pi = 48pi
18 ?
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area of the blue sector = 120/360 * area of circle
area of the blue sector = 120/360 * 196pi = 1/3 * 196 * 3.14 = 205. 1466666666....
take nearest in ur option
19 ?
have done before :P
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i ment 20
which ?
20 new document
60/360 * area of circle = 1/6 * 3.14 * 4 * 4 = 8.37
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21
I've had enough to eat ur question :P
huh
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