Question

plz answer. ..........​

Answer 1

We have to find the LCM of 40 cm, 42 cm and 45 cm to get the required minimum

distance. Because we are asked the minimum distance

 Now,

 40 = 2 × 2 × 2 × 5,

 42 = 2 × 3 × 7

45 = 3 × 3 × 5

∴ LCM (40, 42, 45)

= 2 × 3 × 5 × 2 × 2 × 3 × 7

= 30 × 12 × 7

= 210 × 12

= 2520

Minimum distance each should walk 2520 cm. so that, each can cover the same

distance in complete steps.

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