Question

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

Answer 1

v = d/t

1 = d/t

d = t

ManPosition d1 = 50m = 10 × 5 = 10th floor

ManPosition d2 = 2nd floor

Time taken = d1 - d2 = 10 - 2 = 8s