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Q.

An elevator starts at the 12th floor, goes down 7 floors and then up 15 floors. At which floor is it then

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a

20

b

15

c

7

d

12

answer is A.

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Detailed Solution

He starts at 12th floor and down 7 floors =12−7=5 th floor

Again up 15 floors=5+15=20

Now elevator is at 20th floor.

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An elevator starts at the 12th floor, goes down 7 floors and then up 15 floors. At which floor is it then