A multistory building has 25 floors above the ground level each of hei

1.	A multistory building has 25 floors above the ground level each of height 5 m. It also has 3 floors in the basement each of height 5 m. A lift in building moves at a rate of 1 m/s. If a man starts from 50 m above the ground, how long will it take him to reach at 2nd floor of basement?
Answer» Height of each floor = 5 m ∴ Height below the basement to be covered = 2 × 5m = 10m If a man starts from 50 m above ground level and reach at 2nd floor of basement. ∴ His total distance to be covered = (50 + 10) m = 60 m Rate of moving of a lift = 1 m/s ∴ A man reach at 2nd floor of basement in 1 × 60 = 60 seconds or 1 minute.

A multistory building has 25 floors above the ground level each of height 5 m. It also has 3 floors in the basement each of height 5 m. A lift in building moves at a rate of 1 m/s. If a man starts from 50 m above the ground, how long will it take him to reach at 2nd floor of basement?

Answer»

Height of each floor = 5 m

∴ Height below the basement to be covered = 2 × 5m = 10m

If a man starts from 50 m above ground level and reach at 2nd floor of basement.

∴ His total distance to be covered

= (50 + 10) m = 60 m

Rate of moving of a lift = 1 m/s

∴ A man reach at 2nd floor of basement in 1 × 60 = 60 seconds or 1 minute.