In an agriculture experiment, a solution containing 1 mole of a radioactive meterial `(t_(1//2)=14.3 days)`was injected into the roots of a plants.the plant was allowed 70 hours to settle down and then activity eas measured in its fruit. If the activity measured was `1 mu Ci` what per cent of activity is transmitted from the root to the fruit in steady state?

Options

A. `1.26xx10^(-11)%`
B. `2.52xx10^(-11)%`
C. `0.63xx10^(-11)%`
D. `1.78xx10^(-11)%`

Answer

A

Explanation

`R_(0)=N_(0)lambda` After 70 hours, `R=R_(0)e^(-lambda t)`
percentage of acitvity transmitted
`=("activity around in")/(R )xx100%`