Question

The ratio of circumference of a circle to its diameter is 22:7.Find the circumference of a circle 2 cm and 1 mm in diameter

Answer 1

Answer:

The circumference of the circle is 6.6 cm

Explanation:

To work out the question, we need to convert the mm to cm to work with the same units.

1 mm = 0.1 cm

The diameter of the circle = 2 cm  + 0.1 cm = 2.1 cm

The ratio of the circumference to the diameter is 22:7

Given the diameter, the circumference is given by:

22/7 × 2.1 = 6.6 cm

The circumference of the circle is 6.6 cm