Question

b) A circular track is formed between two concentric circles of radii 7m and 14m.
What is the area of the track?​

Answer 1

Answer:

Area of the track=Π(R^2 -r^2)

22/7(149-49)

22/7.147

462m^2

Answer 2

Answer:

$area = \pi( {R}^{2} - {r}^{2} ) \\ = \pi( {(14)}^{2} - {(7)}^{2} ) \\ = \pi(196 - 49) \\ = \pi \times 147 \\ = \frac{22}{7} \times 147 \\ = 22 \times 21 \\ = 462 \: {m}^{2}$

The area of the track is 462 m^2.