Question:medium

If a radioactive substance decays by 40% and 70% in 10 and 30 minutes respectively, then the time taken for the substance to decay by 50% (in minutes) is:

Show Hint

Always write radioactive decay problems in the form: \[ \frac{N}{N_0}=e^{-\lambda t}. \] Then use logarithms to find \(\lambda\) and half-life.
Updated On: Jun 18, 2026
  • 20
  • 16
  • 18
  • 22
Show Solution

The Correct Option is A

Solution and Explanation

Was this answer helpful?
0

Top Questions on Nuclei

Questions Asked in TS EAMCET exam