Question

diameter 28 cm what is radius and circumference

Answer 1

radius =
$\frac{28}{2 } = 14$
circumference=
$2\pi \: r \\ 2 \times \frac{22}{7 \times} \times 14 \\ 88 {cm}^{2}$

Answer 2

d =28 cm
r : d/2
r : 28/2
r : 14 cm
Circumference : 2πr
Circumference : 2×22/7×14
circumference : 88 cm