Time Equal. Uniform Acceleration. Distance = ???

A body starts from rest and is uniformly accelerated for a minute. Distance traveled in first 20 seconds is x1,{ x }_{ 1 }, in the next 20 seconds is x2,{ x }_{ 2 }, and in the last 20 seconds is x3.{ x }_{ 3 }.

If x1,{ x }_{ 1 }, x2{ x }_{ 2 } and x3{ x }_{ 3 } are in the ratio A:B:C,A:B:C, where A,B,A,B, and CC are coprime positive integers, then what is A+B+C?A+B+C?

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