In a morning walk three persons step off together, their steps measure 80 cm, 85 cm and 90 cm respectively. What is the minimum distance each should walks he can cover the distance in complete steps?

Explanation

Prime factorisation of a natural number is unique.



`80= 2 × 2 × 2 × 2 × 5`


`85 = 5 × 17`


`90 = 2 × 3 × 3 × 5`
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