Questions
In a radioactive material, fraction of active material remaining after time t is 9/16. The fraction that was remaining after t/2 is :
a
78
b
35
c
45
d
34
detailed solution
Correct option is D
If fraction after 't'2 is x then after ‘t’, it is x2 x2=916 ⇒x=34Talk to our academic expert!
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If 10% of a radioactive material decays in 5 days, then the amount of the original material left after 20 days is approximately
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