What is the distance in km of quasar fr...

What is the distance in km of quasar from whigh light takes 3 billion years to reach us? `c=3xx10^(5)` km/s.

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`S= x xx t = 3 xx 10^(8)xx 3 xx 10^(9)xx 365.25xx 24xx 60xx 60`
`2.84xx 10^(22) km`.

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