Question

Answer is 32 Year's
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Answer 1

Answer:

Explanation:

50μm -------- > 2.5 s

   1 m ---------->  2.5 / 50μ

                     0.05 x 10^6 sec

divide by 1.3 x 10^7

1 year= 1.3 x 10^7s

 you get 38 years just approximate it