Question

a 3/4 of original amount of radioisotopes decays in 60 minutes . what is its half life?​

Answer 1

Answer:

30 minutes beacause after ist half life 2nd half life is 1/4 and every half life is double of ist half life

Answer 2

Answer:

40 minutes

Explanation:

3/4 is decomposed in 60 min

therefore 100% will decompose in 60/3*4=80 minutes and half will decompose in 40 min