The diameter of two circles are 4cm and 6cm respectively. Find the ratio of their areas.
With steps and explanation
Answers
Answered by
1
Answer:
A1 = πr1²
= 2²π ( d1=4 cm ,r1= 2 cm)
= 4π
A2= πr2²
= 3²π
= 9π
A1/A2 = 4π/9π
= 4/9
Ratio is 4:9
Answered by
0
Answer:
4/9
Step-by-step explanation:
diameter d₁ = 4
∴r₁ = 2
d₂ = 6
∴r₂ = 3
As area of a circle = πr²,
∴ the ratio of their areas A₁/A₂ = πr₁²/πr₂² = r₁²/r₂²
= 2²/3²
= 4/9
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