Mathematics
Grade9
Easy

Question

A group of students wants to find the diameter of the trunk of a young sequoia tree. The students wrap a rope around the tree trunk, then measure the length of rope needed to wrap one time around the trunk. This length is 21 feet 8 inches. Estimate the diameter of the tree trunk.

  1. 6.9 feet    
  2. 5.9 feet    
  3. 4.8 feet    
  4. 7.6 feet    

hintHint:

Circumference =  3.14 x d

The correct answer is: 6.9 feet


    Given, Circumference = 21 feet 8 inches = 21.67 feet
    Circumference =  3.14 x d
    pid = 21.67
    Diameter = fraction numerator 21.67 over denominator 3.14 end fraction= 6.9 feet

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