A trundle wheel can be used to measure the walking distance between two locations.
a) If the diameter of a trundle wheel is 45cm, how far will a person have walked when the wheel makes one full rotation?
b) If a person walks for 0.7km, how many times has the wheel rotated?
We are currently working on measurement and conversion, I understand that measurement is involved in this question but I don't know how, when, why, and what to convert. One full rotation is 360 degrees right? I don't get how 360 degrees and 45cm go together.
3 answers
If the diameter of the wheel is 45 cm then the radius is 45/2 = 22.5 cm and the circumference is pi*r^2. When the wheel makes one full revolution it will have traveled the circumference of the wheel.
Is my face red. Circumference, which is what you want, is pi*diameter. I, unfortunately, gave you the formula for the area of a circle. Bad! I get an "F" for the day.
Hello! i have the same question and i did pi*diameter (3.14*45cm) and got an answer of 141.3cm.
3 answers