The height from the ground to the top of a tire on a chold's bike is 42 cm. What's the distance the bike travels for one revolution of the tire?

C = πd = 42π = 132 cm

Thank you!!!

To find the distance the bike travels for one revolution of the tire, you need to know the circumference of the tire. The circumference is the distance around the outside of a circle, in this case, the tire.

To calculate the circumference, you can use the formula: Circumference = 2πr, where "r" is the radius of the tire.

However, in order to use this formula, we first need to determine the radius of the tire. We know the height from the ground to the top of the tire is 42 cm, but this is not the same as the radius.

The radius is half the diameter of a circle. Since we only have the height, which is the distance from the ground to the top of the tire, we need to subtract the radius to account for the thickness of the tire.

Let's assume the thickness of the tire is T cm (we don't have this value yet, but we will account for it later). The diameter of the tire would then be the height plus twice the thickness of the tire:

Diameter = 2 * (height + thickness)
Diameter = 2 * (42 cm + T cm)

Now we have the diameter, but we still need the radius. The radius is half the diameter, so we divide the diameter by 2:

Radius = 1/2 * Diameter
Radius = 1/2 * 2 * (42 cm + T cm)
Radius = 42 cm + T cm

Now that we have the radius, we can calculate the circumference using the formula:

Circumference = 2πr
Circumference = 2π * (42 cm + T cm)

Therefore, the distance the bike travels for one revolution of the tire is 2π * (42 cm + T cm) cm.