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#18 please help. Thank You.
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#18 please help. Thank You.

#18 please help. Thank You.-example-1
User Omarjmh
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20 cm scale is: 1 cm=5000 light years
5 m scale is:1 m=20000 light years or 1 cm= 200 light years
User Bogdan Nechyporenko
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