Question

The circumference of three wheels are 36 cm ,40 cm and 126 cm respectively. They start moving simultaneously. What least distance should they cover so that each wheel makes a complete number of revolutions?

Answer 1

To find least distance we had to find LCM
36-> 3×3×2×2
40-> 2×2×2×5
126-> 3×2×3×7
LCM = 2520cm
Thus each should walk this distance to make complete number of revolution....
Hope it help u....