Question

1
LEVEL - II
How many years it would take to spend Avogadro's number of rupees at the rate 10 lakhs per second?
1) 100 years
2) 1.8 x 10 years
years
4) 1.9x 10º years
3) 1.9x 10^9year

Answer 1

Answer:

option 3 1.9 * 10^9yrs

Explanation:

yrs = 6.203 *10 ^23 /100000 *3600*24 *365

         = 3 1.9 * 10^9yrs Ans

Answer 2

Answer:

Option 3 - 1.9 x 10^9

Explanation:

Avogadro's number of rupees = 6.022 × $10^{23}$

You spend 10 lakhs ($10^{6}$) = 1 sec

so, You will spend 6.022 × $10^{23}$ = 6.022 × $10^{23}$/$10^{6}$

                                                    = 6.022 ×$10^{17}$ sec.

Number of years to spend the money = $\frac{6.022 . 10^{17} }{60.60.24.365}$ = 1.9 x 10 ^9

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