Q.2 Three boys.step 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 the distance in complete steps?
$$\begin{array}{|l} \llap{7~~~~} 63, 70, 77 \\ \hline 9, 10, 11 \end{array}$$ LCM = 7×9 ×10× 11 = 6930 cm