Question

a building of 50 floors every floor of the building is 6 m high if it's elevator moves 3 metre per second and how long will it take to move from 2nd floor to 42 floor.

Answer 1

80 seconds
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Answer 2

Since, if every floor of building is 6 m high.
And, a elevator take 3s/per/m.
Time will taken by elevator to move 2nd floor to 42 floor.
= 50-42+2
=40 floor
=one floor = 6 m
=40 floor =40*6
=240m
Since, a elevator move 3m/per/s
So, time taken to move 240m= 240/3m
=80 seconds