1.

The volume of spherical ballon being inflated changes at a constant rate. If initially its radius is 3 units and after 3 seconds it is 6 units. Find the radius of ballon after t seconds.

Answer»

`3sqrt(63t+9)`
`3sqrt(63t+27)`
`3sqrt(63t-9)`
`3sqrt(63t-27)`

ANSWER :B


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