Mathematics
Grade-7
Easy

Question

The radius of a cycle wheel is 35 cm. Determine the revolutions made to cover 81.40 m.

  1. 45
  2. 37
  3. 39
  4. 76

hintHint:

Number of revolutions  = fraction numerator 81.40 over denominator c i r c u m f e r e n c e space o f space t h e space w h e e l end fraction

The correct answer is: 37


    straight C equals 2 pi straight r comma
straight C equals 2 cross times 22 over 7 cross times 0.35 comma
straight C equals 2.2 space straight m comma text end text
text Revolutions  end text equals 81.40 divided by 2.2 comma
text  Rev  end text equals 37

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