Answer:
5) 96.506 revolutions ≅ 97 revolution
6) circumference (c) = 83.1355
Explanation:
5) A bicycle wheel has a radius of 33 cm. How many revolutions of the wheel are needed to cover a distance of 200 m?
If you read it twice through, you realize that the answer needs to be in meters, not centimeters. Therefore, convert the
33 cm to meters. 100 cm = 1 meter
33 cm= 0.33 meter
1 revolution= one complete time around the wheel The distance around the wheel or circle= Circumference
Use the circumference formula: C=2πr
2(3.14)(0.33) ≅ approximately equal to 2.0724M= 1 Revolution
At this point you can divide 200 by 2.0724 to find out how many revolutions it would take for 200 meters, or you can set
up a proportion as follows: 2.0724 meters/ 1 revolution ≅ 200 Meters/ X revolutions .
Cross multiply, and you get 88 ≅2.198X 200/2.0724 ≅ 96.506 revolutions. Answer
6) Radius (r) = 13.23142
Diameter = 26.46284
circumference (c) = 83.1355
Area = 550m²