Question

Q5. The area of a circle is increased by 22 cm2 when its radius is increased by 1 cm. The original radius of the
circle​

Answer 1

Answer:

The area of a circle is increased by 22 cm2 when its radius is increased by 1 cm. The original radius of the circle is. 3 cm. 5 cm

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

let's original radius = r

& new radius = r' = r+1

according to question,

πr'² = πr²+22_______________(1)

π(r+1)² = πr²+22

π(r+1)²-πr² = 22

(r+1)²-r² = 22/π

(r+1+r) (r+1-r) = 22×(7/22)

2r+1 = 7

so, r = 3cm answer