How many years would it take to spend Avogadro number of rupees @ 10 lakh rupees per second

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Solution

Avogadro's number = 6.023 x 10^23

If we spend Rs. 10,00,000 in 1 sec,

then Rs. 6.023 x 10^23 will be spent in (6.023 x 10^23 / 10,00,000) = 6.023 x 10^17sec.

6.023 x 10^17sec. = 6.023 x 10^17 / (60x60x24x365) = 1.909 x 10^10 years.

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