Question

on a morning walk, three persons step off together and their steps measure 40 cm, 42 cm, amd 45 cm respectively. what is the minimum number of distance each should walk so that each can cover the same distance in complete steps?
A) 2520
B) 2525
C) 2555
D) 2528

Answer 1

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Answer 2

Step-by-step explanation:

Solution:-

We have to find the LCM of 40 cm,

42 cm and 45 cm

 Now,

 40 = 2 × 2 × 2 × 5,

 42 = 2 × 3 × 7

45 = 3 × 3 × 5

we use LCM

∴ LCM (40, 42, 45)

= 2 × 3 × 5 × 2 × 2 × 3 × 7

= 30 × 12 × 7

= 210 × 12

= 2520

$answer \: is \: option \: d = 2520$