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The surface area of a balloon being infl...

The surface area of a balloon being inflated, changes at a rate proportional to time `t`. If initially its radius is 1 unit and after 3 secons it is 2 units, find the radius after t seconds.

A

`sqrt(t^(2)/(3)+1)"units"`

B

`sqrt((t^(2)+1)/(3))"units"`

C

`sqrt(t^(2)+1)"units"`

D

`sqrt(t^(2)+3)"units"`

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The correct Answer is:
A
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