The mean lives of radioactive substance are 1620 year and 405 year for alpha- emission and beta- emission respectively. Find out the time duringwhichthree fourth of a samplewill decay, if it is decaying both by alpha- emission and beta- emission simulaneously.

The mean lives of radioactive substance are 1620 year and 405 year for

1.	The mean lives of radioactive substance are 1620 year and 405 year for alpha- emission and beta- emission respectively. Find out the time duringwhichthree fourth of a samplewill decay, if it is decaying both by alpha- emission and beta- emission simulaneously.
Answer» ANSWER :`449.24` YEAR