Mathematics · 2022
JEE Main · 24 June 2022, Shift 1 · Q3
The surface area of a balloon of spherical shape being inflated, increases at a constant rate. If initially, the radius of balloon is 3 units and…
The surface area of a balloon of spherical shape being inflated, increases at a constant rate. If initially, the radius of balloon is $\displaystyle 3$ units and after $\displaystyle 5$ seconds, it becomes $\displaystyle 7$ units, then its radius after $\displaystyle 9$ seconds is :
Official answer
(1)
$\displaystyle 9$
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.