the area of the umbrella varies directly as the square of its radius if the radius of the umbrella is doubled how much will be the area of the umbrella
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The area of umbrella will be π(2r)²
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Answer:
4 times
Step-by-step explanation:
Because a= \pi r^2
r=2 then its square is 4 then the area is 4 times because it is directly proportional to r
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