Question

Think About the Process The circumference of one coin is 8.03 cm. The circumference of another

coin is 0.33 cm smaller. What is the first step to find the diameter of the smaller coin? What is the
22
diameter of the smaller coin? Use for .
7
What is the first step to find the diameter of the smaller coin?

Answer 1

First step will be option D.

Diameter of the smaller coin will be 2.45 cm

Explanation:

Circumference of one coin = 8.03 cm

Circumference of the smaller coin = Circumference of the larger coin - 0.33

= 8.03 - 0.33

= 7.7 cm

Circumference of the smaller coin = 2πr = 7.7

r =
`(7.7)/(2\pi )`

r =
`(7.7* 7)/(2* 22)`

r = 1.225 cm

Diameter of the smaller coin = 2 × radius of the smaller coin

= 2 × 1.225

= 2.45 cm

Therefore, first step will be option D.

Diameter of the smaller coin will be 2.45 cm