Question

A multistorey bullding has 25 loors above the ground level each of
helght 5m. It also has 3 loors in the basement each of height 5m. A
lift in building moves at a rate of lm/s. If a man starts from 50m
above the ground, how long will it take hlm to reach at 2nd loor of
basement?​

Answer 1

Answer:

20 minutes

Step-by-step explanation:

Total distance from 3rd floor basement to 25th floor=140 metres

starting point: 50 metres above ground (+50) = 10th floor

ending point: second floor of basement (-2)

Distance between starting point and ending point= 50 metres(above ground) + 10 metres(below ground basement) = 60 metres

speed of elevator = 1 metre per second

60 metres in floors= 60* 5 = 300 metres

Time taken to reach 5 metres or one floor = 5 seconds

to reach 300 metres = 300 seconds or 5 minutes

mark brainliest