The active amount of radioactive substance left after one hour whose half life is $20$ minutes is?
$\frac{1}{8}$
$\frac{1}{32}$
$\frac{1}{16}$
$\frac{1}{9}$

Question

The active amount of radioactive substance left after one hour whose half life is 20 minutes is-dfrac-1-8-dfrac-1-32-dfrac-1-16-dfrac-1-9-

Toppr Admin · Accepted Answer

The active amount of radioactive substance left after one hour whose half life is 20 minutes is?1813211619