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Two persons are climbing up on two moving escalators which have 120 steps. The ratio of 1st person's speed to that of 1st escalator is 2:3 (steps). The ratio of 2nd person's speed to that of 2nd escalator is 3: 5 (steps). The total number of steps taken by both the persons are
  • a)
    85
  • b)
    93
  • c)
    80
  • d)
    75
  • e)
    95
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Two persons are climbing up on two moving escalators which have 120 s...
First person: For every 2 steps he takes, the escalator moves by 3 steps at the same time. Hence, 5 steps are covered at a time.
This is repeated 24 times(120/5).
Hence, first person takes = 24 X 2 = 48 steps
Second person: For every 3 steps he takes, the escalator moves by 5 steps at the same time.
Hence, 8 steps are covered at a time.
This is repeated for 15 times(120/8)
Hence, second person takes = 3 X 15 = 45 steps
Total number of steps = 48 + 45 = 93
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Most Upvoted Answer
Two persons are climbing up on two moving escalators which have 120 s...
Problem Solving Approach:

Let us solve this problem step by step.

Given:

- The total number of steps in both the escalators is 120.
- The ratio of the 1st person's speed to the 1st escalator is 2:3.
- The ratio of the 2nd person's speed to the 2nd escalator is 3:5.

Let us find the steps covered by each person in one minute:

- Speed of the 1st person = 2/3 of the speed of the 1st escalator (as per the given ratio)
- Speed of the 2nd person = 3/5 of the speed of the 2nd escalator (as per the given ratio)
- Steps covered by the 1st person in one minute = (2/3) * 120 = 80
- Steps covered by the 2nd person in one minute = (3/5) * 120 = 72

Therefore, the total number of steps covered by both persons in one minute = 80 + 72 = 152

Now, we need to find the total number of steps covered by both persons. We can do this by finding the time taken by both persons to cover 120 steps and then multiplying it by the total steps covered in one minute.

Let us find the time taken by each person to cover 120 steps:

- Time taken by the 1st person to cover 120 steps = 120/80 = 1.5 minutes
- Time taken by the 2nd person to cover 120 steps = 120/72 = 1.67 minutes

Now, let us find the total steps covered by both persons:

- Total steps covered by both persons = (1.5 + 1.67) * 152 = 92.64

Rounding off to the nearest integer, we get the total number of steps covered by both persons as 93.

Hence, the correct answer is option B) 93.
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Two persons are climbing up on two moving escalators which have 120 steps. The ratio of 1st person's speed to that of 1st escalator is 2:3 (steps). The ratio of 2nd person's speed to that of 2nd escalator is 3: 5 (steps). The total number of steps taken by both the persons area) 85b) 93c) 80d) 75e) 95Correct answer is option 'B'. Can you explain this answer?
Question Description
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