an elevator descends at the rate of 8m/min.if the descent starts from 5m above the ground level,how much time will it take to reach -475m ?

Answer 1

Distance travelled
=8-(-475)
=483 m

Speed
= 8 m / min.

Time = Distance ÷ speed
=483÷8
=60.375 minutes

Answer 2

if we round up we get 60min/1 hour

Answer 3

If the original question has a unit of 8m/min., I prefer to give the answer in minutes. The question did not say to answer in hours, and did not say you have to round to the nearest hour.

But it is up to you.

Answer 4

mathmate,she is right,she is trying to say that the answer , if we round up we get 1 hour.
cuz may be her mathbook's back answer is 1 hour or 60 minutes