If 2a = 3b and 4b = 5c, find : a : c.
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The work done by (x - 2) men in (4x + 1) days and the work done by (4x + 1) men in (2x - 3) days are in the ratio 3 : 8. Find the value of x.
If 3A = 4B = 6C, find : A : B : C.
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