Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The half-life of 
is 245 days. After 
days, 
of original activity remained. The value of 
in days is 
. (Nearest integer) (Given: 
and 
)
Text Solution
Verified by ExpertsThe correct answer is:
102
(102)
Using radioactive decay: 
.
With 
activity remaining: 
.
Taking log base 
.
Calculate: 
and 
.
Thus 
, giving 
days (nearest integer)
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