Question

A multistorey building has parking floors. A lift moves at the rate of 4 m per 15 second. If the lift start coming down from a height of 40 m then find it's position after 3 min

Answer 1

Answer:

8 m from earth after touching the earth's surface

Step-by-step explanation:

As we know that the lift is moving 4m per 15 second.

also given that we have to cover a heght of 40 m

now 15 = 4m

in 3 mints second is = 3×60 = 180 second

if 15 sec = 4m

then 180 sec = ?

=> 180/15×4

=> 12×4 = 48

but the height is 40 m and lift covered 48 m

it means it comes down and go beck upwards

so the height is 8 m from earth I think