Question

If the average human life span were of the order104s, what would the revolution period of earth on this scale be?

Answer 1

Actually, Revolution period of earth= 10^7 (order)and Avg.human life =10^9(order) Avg.human life span =10^4 (given) Let,Revolution period of earth = X so, 10^7 ÷ 10^9 = X ÷ 10^4 → 10^-2 =X ÷ 10^4 → (10^-2)* (10^4)=X → X= 10^2...........Ans