Aptitude - Simplification - Discussion
Discussion Forum : Simplification - General Questions (Q.No. 15)
15.
David gets on the elevator at the 11th floor of a building and rides up at the rate of 57 floors per minute. At the same time, Albert gets on an elevator at the 51st floor of the same building and rides down at the rate of 63 floors per minute. If they continue travelling at these rates, then at which floor will their paths cross ?
Answer: Option
Explanation:
Suppose their paths cross after x minutes.
Then, 11 + 57x = 51 - 63x 
120x = 40
| x = | 1 |
| 3 |
| Number of floors covered by David in (1/3) min. = |  |
1 | x 57 |  |
= 19. |
| 3 |
So, their paths cross at (11 +19) i.e., 30th floor.
Discussion:
28 comments Page 3 of 3.
Monsahab said:
5 years ago
Anyone, explain the Solution, please.
(1)
Rabia said:
10 years ago
@Geeni.
Please explain last step.
Please explain last step.
Shivani said:
7 years ago
Thanks for your solution @Mani.
DAg said:
2 years ago
Thanks for the answer @ Finara.
Saba khan said:
9 years ago
You are very talented @Geeni.
Nje said:
1 decade ago
Geeni you're a genius.
Rehana said:
1 decade ago
Its 40f/120f/m=1/3min
Anshi said:
8 years ago
@Mani.
Good one.
Good one.
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