Every floor of a 20 storey building is 5 meter high. If a lift moves 2 meter every second. How long will it take to move from 3rd floor to 15th floor?
Given:
Every floor of a 20 storey building is 5 meters high.
A lift moves 2 meters every second.
To do:
We have to find how long it will take to move from 3rd floor to 15th floor.
Solution:
The height of each storey $= 5\ m$
Total distance travelled by the lift from 3rd floor to 15th floor $=13\times5 = 65\ m$
Speed of the lift $= 2\ m/s$
Time taken by the lift $=\frac{Distance}{Speed}$
$= \frac{65}{2}$
$=32.5$ seconds
The lift takes 32.5 seconds to move from 3rd floor to 15th floor.
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