If x/2 = y/3 = z/5, then find the value of (x + y + z) / z.

मान लीजिए x/2 = y/3 = z/5 = k। तब x=2k, y=3k, z=5k। (2k + 3k + 5k) / 5k = 10k / 5k = 2।