Question

12) A spool has a diameter of 3.5 cm. If a string
makes 15 turns around it, what is its length?​

Answer 1

Answer:

165 cm

Explanation:

Hey there, here is the solution.

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STEP 1: Find 1 turn:

Circumference = πD

Circumference = π(3.5)

Circumference = 3.5π cm

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STEP 2: Find 15 turns:

1 turn = 3.5π

15 turns = 3.5π x 15

15 turns = 52.5π

15 turns = 165 cm

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Answer: The length of the string is 165 cm.