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The age of the universe is about 10^17 y...

The age of the universe is about `10^17` years whereas the mankind has existed for `10^9` years. For how many seconds would the man have existed if the age of universe were 1 day ?

Text Solution

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`("The age of the universe")/("The age of the mankind")=(10^(17))/(10^(9))=10^(8)` According to nes scale, the age of universe = 1 day = 86400 s. If the age of man = x
Again the ratio of the two should be `10^(8)`.
`therefore" "(86400)/x=10^(8)`
`rArrx=86400/10^(8)=8.64xx10^(-4)s`
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