In a morning walk, three person step off together. Their steps measure 70 cm, 75 cm and 80 cm respectively. what is the minimum distance each should walk so that can cover the same distance in complete steps?
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Hence, the minimum distance is 12240 cm. Note: You can also directly attempt to find the minimum distance by considering the multiples of 80, 85 and 90, but solving by finding LCM is the best choice.
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"For minimum distance you should take LCM of 70,75 and 80"
LCM
70=2×5×7
75=3×5×5
80=2×2×2×2×5
"LCM is 2⁴×3×5²×7=8400"
Minimum distance should be 8400cm.
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