Quantitative Aptitude Ques 1743

Question: In a morning walk, three persons step off together. Their step measure 80 cm, 85 cm, and 90 cm, respectively. The minimum distance each should walk to cover the distance in complete step is

Options:

A) 12 m 40 cm

B) 138 m 90 cm

C) 122 m 40 cm

D) 90 m 20 cm

Show Answer

Answer:

Correct Answer: C

Solution:

  • LCM of 80 cm, 85 cm, 90 cm $ =2\times 2\times 2\times 2\times 5 $ $ =15\times 17 $ $ =2\times 5\times 3\times 3 $

$ \therefore $ $ 2\times 2\times 2\times 2\times 5\times 17\times 3\times 3=12240cm $ $ =122m40cm $

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