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A quick calculation is just under ten and a half hours

as 50 x 10 = 500 and 20 (500-520) is nearly halfof 50

520/50 = 10.4 so 10 hours

then (10.4 - 10.0) 0.4 x 60 minutes = 24

Answer: 10 hours 24 minutes

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10y ago

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