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If a, b, c and d are positive integers ...

If `a, b, c and d` are positive integers and `a lt b lt c lt d` such that `a,b,c` are in `A.P. and b,c,d` are in `G.P. and d-a=30`. Then ` d-c ` is ` k` then find the sum of the digits in `k`

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