Question

The half-life of a radioactive element is $40$ days. Calculate the average life:

• A. 5.76 days
• B. 5 7.6 days
• C. 646 days
• D. 4.56 days

Answer 1

Answer: (B)

Use formula, $T=1.44\times t_{1/2}$ to solve the question.
Here $T=$ average life
$t_{1/2}=$ Half-life period
$=40$ days.
Substituting the values
$=1.44\times 40$
$=57.6$ days