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An accident in a nuclear laboratory …

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An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of half life 18 days inside the laboratory. Tests revealed that the radiation was 64 times more than the permissible level required for safe operation of the laboratory. What is the minimum number of days after which the laboratory can be considered safe for use? (A) 64 (B) 90 (C) 108 (D) 120

Posted by Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

CBSE > Class 12 > Physics

12 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

accha socha tum dono ne choro mujhe. gud bye.

Rohan Řąjpůť 6 years, 1 month ago

bhai mai kya bol raha hoon chor na isay. ????

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

actually bro mujhe kisi ka sry chahhiye bhi nhi. ????

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

bro rehne de na... zarrort kya hai I don't think ke kuch wrong bola hai. ??

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

?????

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

thoda limit mein bol.

Řøhăň Řąjpůť ✌️✊ 6 years, 1 month ago

? ? ? tu pgl ho gyi hai kya pdh pdh kr. ??? itna simple question puch rhi hai. ? ?

Amol Gùpta 6 years, 1 month ago

??

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

thanks ? ?

Amol Gùpta 6 years, 1 month ago

Time required= 6half lifes =6 × 18 =108

Ďãřşháñăã Yadav ? ? ? 6 years, 1 month ago

yes...correct hai hint DE do iska bus

Amol Gùpta 6 years, 1 month ago

C-108 is the answer

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