Question

Three boys steps off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm, respectively. What is the minimum distance each should cover so that all can cover distance in complete steps?

• A. 6930 cm
• B. 6000 cm
• C. 7000 cm
• D. 6520 cm

Answer 1

The correct option is A 6930 cm

The minimum distance all boys should cover is the LCM of $63cm$, $70cm$ and $77cm$

Therefore, $LCM=2\times 3\times 3\times 5\times 7\times 11=6930$

So, $6930cm$is the minimum distance each should cover so that all can cover distance in complete steps.