Answers

2015-09-24T14:32:21+05:30
To find the least distance, find the LCM of circumference of all three wheels.

40 = 2*2*2*5
60 = 2*2*3*5
70 = 2*5*7

LCM = 2*2*2*3*5*7 = 840 cm

So they should travel minimum 840cm to make a complete number of revolutions simultaneously.
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