Question

A multi-story building has 25 floors above the ground level each of height 5 m It also has the three floors in the basement each of the height 5mA lift in building moves at a rate of 1 m per second If a man starts from 50 m above the ground, how long will it take him to reach at the second floor of the basement

Answer 1

Answer:

1 minute

Step-by-step explanation:

given,

1 floor =5m

25 floor =125 m

basement 3 floor =75m

lift travel at speed of 1m/s

1 mins=60 metres

now lift have to move from 50 metres above and 2 floor in basement =50+(2×5)

=60 m

60 m is the totall lenght that lift should travel

it travel at speed of 1m per s

so,

60× 1

=60 sec= 1 minute

in 1 minute lift can cover whole distance