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A cotton reel has a diameter of 3cm. 91 metres of cotton goes around it.

How many times does the cotton go around the reel? And give your answer to the nearest ten

1 answer

Diameter of the reel is 3cm

circumference(C) of the reel = TTD = 3TT cm

No.of times the cotton go around the reel= length of the cotton/C

= 0.91 m / 3TT cm

= 91cm / 3x 3.14 cm---------------> 100cm =1m

= 9.66

so,the cotton will go around (approximatly)10 times around the reel.

If the length of the cotton is 91m which is 9100cm
then,
No.of times the cotton go around the reel= length of the cotton/C = 9100 /3x3.14

=966

Answer will be 966 times
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