a ) answer: A virus strain ic said to cpread at a rabe proportional to the number of applicted people in a locality. If the number of infected aivi lian greww twice in 10 days, How many days will it take por it to be Ca) four times or (b) seven times than that of the original?

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A: Given:                      Radius (r) = 20 cm                                    ∆r = ±0.05 cm

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A: We have to integrate the given expressions.

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