Question

there are 25 floors in a building . from a floor of building a lift goes up 15 floors , then goes down 3 floors and again goes up 8 floor to reach the top of the floor. on which floor was the lift in the beginning​

Answer 1

Answer:

Let the beginning floor be x .

From the given conditions ,

∴x+15-3+8=25

∴x+20=25

∴x=25-20

∴x=5

Answer 2

Step-by-step explanation:

The elevator goes 15 floors down..which means that it is 15-3=12th floor. Then it goes 8 floors up..which means 8+12=20th floor. Therefore..the elevator is on the 20th floor.