Question

Find the area of a circle whose diameter is
(i) 28 cm, (ii) 1.4 m.​

Answer 1

Step-by-step explanation:

Area of Circle is

1st answer

$\pi \: {r}^{2}$

$radius \: = \: \frac{28}{2} \\ = 14$

$\frac{22}{7} \times 14 \times 14 \\ = 22 \times 2 \times 14 \\ = 616 {cm}^{2}$

2nd answer⇓⇓

(2)1.4m

Area of Circle = πr^2

= 22/7 × 0.7 × 0.7

= 22/0.1 × 0.7

= 15.4m^2 OR 154m^2

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