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The rate of decay of certain substance i...

The rate of decay of certain substance is directly proportional to the amount present at that instant . Initially there are 27 gm of certain substance and three hours later it is found that 8 gm are left. Find the amount left after one more hour.

A

`(2)/(3)` grams

B

`(4)/(3)` grams

C

`(8)/(3)` grams

D

`(16)/(3)` grams

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The correct Answer is:
D
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