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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
23 Oct 2021

Given information

Air being pumped into a spherical weather balloon . At any time t , the volume of the balloon is V(t) and its radius is r(t).

Step-by-step explanation

Step 1.

Use formula of the volume of a sphere.

  

Differentiating it w.r.t. t,

    

   

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