Radioactive substance becomes 1/16th of original in 80 minutes. find half life

After 2 hr the radioactive substance becomes 1/16 th of original amount. The t_(1//2) in minutes is

A sample of a radioactive substance undergoes 80% decomposition in 345 minutes. Its half life is …………minutes

If in 3160 years, a radioactive substance becomes one-fourth of the original amount, find it’s the half-life period.

A radioactive substance decays to (3)/(4) th of original value in 2h. The half-life of the substance is

After 2 hours the amount of a certain radioactive substance reduces to 1//16^(th) of the original amount (the decay process follows first-order kinetics). The half-life of the radioactive substance is

A radioactive substance disintegrates 1/64 of initial value in 60 s. The half-life of this substance is

If a radioactive substance reduces to (1)/(16) of its original mass in 40 days, what is its half-life ?

A radioactive substance reduces to 1/32 of its original value in 300 days. The half life of radioactive substance is