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Gas is leaking out of a spherical ballon...

Gas is leaking out of a spherical ballon at the rate of 1800 cubic cm per sec. When the radius of the ballon is 720 cm, the rate at which the surface area is shrinking is

A

5 sq.cm/sec

B

6 sq.cm/sec

C

10 sq.cm/sec

D

15 sq.cm/sec

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The correct Answer is:
A
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AAKASH SERIES-RATE MEASUREMENT-PRACTICE SHEET (EXERCISE - 1) (LEVEL - 1) (STRAIGHT OBJECTIVE TYPE QUESTION)
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