Question

The elevator descends at rate of 5 min .If the descent starts form 50 m above the ground level, find time taken by the elevator to reach -250m​

Answer 1

Answer:

one hour

Step-by-step explanation:

total height needed to descend is 300 metres

so time taken=300÷5 minutes

=60 min

Answer 2

Answer:

The rate of 6m/min means that, in every minute, it goes down by 6m

We have 20 above the ground and 370 m below the ground

Note:

-370 m, means it is 370 m below the ground

Total distance = 20 + 370

                       = 390 m

Time taken = 390/6

                  = 65 minutes

OR

1 hour 5 minutes

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