\(\frac{1}{M}: \frac{1}{N}: \frac{1}{O}=3: 4: 5\) అయితే, M : N : Oకు సమానమైనది:

1
12 : 15 : 20
2
20 : 15 : 12
3
15 : 20 : 12
4
20 : 12 : 15

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