Question

Radioactive substance has half life of four months. Three fourth of the substance will decay in

Answer 1

Radioactive substance has half life of four months. Three fourth of the substance will decay in eight months

Answer 2

Answer:

8 months

Explanation:

1 st four months - 1/2 gone

2nd four months = 1/2 or 1/2 gone = 1/4 gone ; total gone =1/2 + 1/4 = 3/4 gone (decay)

So, 8 months for 3/4 gone (2 half life periods)