What is the circumference of a wheel whose radius is 25cm, to the nearest centimetre?
The formula for the circumference of a circle is C = 2πr, where r is the radius of the circle.
In this case, the radius of the wheel is 25 cm.
C = 2π(25)
C = 50π
To find the approximate value to the nearest centimetre, we need to find the value of π.
Taking π as approximately 3.14, we can calculate the circumference as follows:
C = 50(3.14)
C ≈ 157
Therefore, the circumference of the wheel is approximately 157 cm to the nearest centimetre.