43. The area of a circle is 154sq.cm, then its radius is
44. The ratio of radii of the two circles is 3:5. The ratio of their area is
plz.. answer both the questions
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Answer:
43. 7 cm
44. 9:25
Step-by-step explanation:
43. A = πr²
154 = πr²
r = √(154/π)
r = 7.001 or 7cm
44. r1:r2 = 3:5
A1:A2 = (πr1²):(πr2²)
=>A1:A2 = (r1²):(r2²)
= 3²:5²
= 9:25
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