What is the ratio of areas of two circles if the ratio of their radii is 1:2?* 1️⃣ 1ः2 2️⃣ 2ः1 3️⃣ 1ः4 4️⃣ 4ः1
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1) 1:2
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Ratio of areas of two circles ,
⇒ π(r₁)² : π(r₂)²
⇒ (r₁)² : (r₂)²
⇒ (1)² : (2)²
⇒ 1 : 4