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Q.

On a morning walk, three persons step off together and their steps measure 40 cm, 42 cm, and 45 cm respectively. What is the minimum distance each should walk so that each can cover the same distance in complete steps?


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a

1680 

b

1800

c

756000

d

2520 

answer is D.

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Detailed Solution

Concept: LCM or Lowest Common Multiple can be defined as the smallest common multiple of two or more numbers.
Given that,
Step measure of 1st person = 40cm
Step measure of 2nd person = 42cm
Step measure of 3rd  person = 45cm
To find minimum distance we will find LCM of all persons
Question ImageHence, the correct option is 4) 2520
 
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