Two ratio-isotopes P and Q atomic weight 100 and 200 respectively are mixed in equal amount by weight. After 20 days their weight ratio is found to be 1:4 if t_(1//2) for P is 10 day calculate t_(1//2) for Q.

Two ratio-isotopes P and Q atomic weight 100 and 200 respectively are

1.	Two ratio-isotopes P and Q atomic weight 100 and 200 respectively are mixed in equal amount by weight. After 20 days their weight ratio is found to be 1:4 if t_(1//2) for P is 10 day calculate t_(1//2) for Q.
Answer» ANSWER :`OO`