Question

The circumference of a circular garden is 66m. Find its diameter.(Take π =22/7)

Answer 1

Circumference = pi × d
66 cm = 22/7 × d
d= 21 cm

Answer 2

$circumference \: \: of \: circle = 2\pi \: r \\ 66 = 2\pi \: r \\ 66 = 2 \times \frac{22}{7} \times r \\ r = 66 \times \frac{7}{22 \times 2} \\ r = 10.5 \: m \\ \\ diameter of \: \: garden = 21m$