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Question
How many years it would take to spend Avogadro's number of rupees at the rate of 1 million rupees in one second?
Options:
A .  19.098×1019 years
B .  19.098 years
C .  19.098×109 years
D .  None of these
Answer: Option C
:
C
106 rupees are spent in 1sec. 6.022×1023 rupees are spent in
=(1×6.022×1023)(106×60×60×24×365)years
=19.098×109year

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