Use the following information in exercises 1 and 2. Some skyscrapers have double
ID: 3121009 • Letter: U
Question
Use the following information in exercises 1 and 2. Some skyscrapers have double-deck elevators to minimize the number of elevator shafts required. People entering the building use the bottom deck of the elevator to arrive at odd-numbered floors, or they may take an escalator to and from a mezzanine to use the top deck of the elevator, which stops at even-numbered floors. a. Suppose you had to deliver packages to floors 11, 26, 35, and 48. How could you do so with the least amount of elevator riding and walking only one flight of stairs? b. Describe an efficient scheme for delivering to the 11 floors from 20 to 30.Explanation / Answer
1)
In order to reach odd/even floor from even/odd floor, one has to use mezzanine.
a) Packages to be to Floors 11, 26, 35 & 48.
=> Least amount of Elevator riding and walking only one flight of stairs will be done by,
Start in ottom deck & deliver Packages to Odd floor (11 & 35)
& Using flight of stairs, enter into top deck,
Then deliver to Even floors ( 26 & 48).
b) Efficient way for delivering to Floors 20 to 30 will be
Start in Bottom deck & deliver to all Odd Floors (21, 23, 25, 27 & 29)
Then return to Top Deck using flight of Stairs & deliver to all Even Floors (20, 22, 24, 26, 28 & 30).