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The decay rate of certain substance is d...

The decay rate of certain substance is directly proportional to the amount present at that instant.Initially there are 27 grams of substance and 3 hours later it is found that 8 grams left.The amount left after one more hour is……….

A

`5 2/3 grams`

B

`5 1/3` grams

C

`5.1` grams

D

`5.5` grams

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