Using a tape measure Becky Jo found that the circumference of the great redwood was 900cm. She estimated that its diameter was 300cm. Was her estimate a little too large or a little too small? Why?

Question

Charlee Oconnell

Mathematics

21 September, 21:43

Using a tape measure Becky Jo found that the circumference of the great redwood was 900cm. She estimated that its diameter was 300cm. Was her estimate a little too large or a little too small? Why?

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Answers (1)

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Matias Hull · Answer 1

The length of the circle - the product of the diameter and the number Pi

l = d π

l = 900cm

π ≈ 3,1415 przyjmiemy wartość 3

900cm = d * 3 [:3

d = 300cm

Becky rounded value of Pi, hence the difference in result

More accurate calculation

l = d*π

900cm = d*3,1415

d = 900cm : 3,1415 = 286,49cm

Becky overestimated the outcome