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https://vle.mathswatch.co.uk/images/questions/question1203.png

 Nov 7, 2017
 #1
avatar+96187 
+1

a) D

 

b) 25.71  = 3.142 x

 

x =  25.71 / 3.142   ≈ 8.18 cm

 

 

cool cool cool 

 Nov 7, 2017

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