Question

How many years it would take to spend Avogadro's number of rupees at the rate of 1 million rupees in one second:

• A. $19.098\times {10}^{19}$ years
• B. $19.098$ years
• C. $19.098\times {10}^9$ years
• D. None of these

Answer 1

The correct option is C

$19.098\times {10}^9$ years

${10}^6$ rupees are spent in 1sec. $\therefore$ $6.022\times {10}^{23}$ rupees are spent in =
= $\frac{(1\times 6.022\times {10}^{23})}{({10}^6\times 60\times 60\times 24\times 365)}years$
= $19.098\times {10}^{9}year$