Question

What is the circumference of a circle with a diameter of 72 mm

Answer 1

$circumference \: of \: a \: circle \: is \: \pi \: d$

diameter is 72 mm

pi is 22/7

so 22/7 × 72 is 226.28

Answer 2

Answer:

$circumference \: of \: a \: circle \: = \pi d \\ \pi = \frac{22}{7} \\ c = \frac{22}{7} \times 72 \\ c = 226.28$