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Find the circumference of each of the following circles use 3.14 for pi .

a. 17km
b. 32 inches
c 39 m
d 25 mi​

User Thibs
by
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1 Answer

3 votes

Final answer:

To calculate the circumference of circles with diameters of 17 km, 32 inches, 39 m, and 25 mi, we use the formula C = πd, resulting in circumferences of 53.38 km, 100.48 inches, 122.46 m, and 78.5 mi respectively.

Step-by-step explanation:

Calculating the Circumference of a Circle

To find the circumference of a circle, we use the formula C = 2πr, where 'C' is the circumference, π (pi) is approximately 3.14, and 'r' is the radius of the circle. Since the diameter is twice the radius (d = 2r), we can also use C = πd.

Given the diameters provided:

  • a. 17 km
  • b. 32 inches
  • c. 39 m
  • d. 25 mi

We will calculate the circumference for each:

  1. 17 km: C = 3.14 * 17 = 53.38 km
  2. 32 inches: C = 3.14 * 32 = 100.48 inches
  3. 39 m: C = 3.14 * 39 = 122.46 m
  4. 25 mi: C = 3.14 * 25 = 78.5 mi

The resulting circumferences are given with two significant figures to match the precision of the diameters provided.

User Hcura
by
8.4k points
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