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If 1/x : 1/y : 1/z = 2 : 3 : 5, then determine x : y : z .

6 : 15 : 10
3 : 15 : 10
15 : 3 : 10
15 : 10 : 6

Correct Answer: 15 : 10 : 6

Explanation:

Let 1/x = 2K, 1/y = 3K and 1/z = 5K
Then, x = K/2, Y = K/3 and z = K/5
∴ x : y : z = K/2 : K/3 : K/4
= 1/2 : 1/3 : 1/5
= 15 : 10 : 6

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