Question

The elevator descends at the rate of 15m/min.If the descent starts 50m
above the sea level,find the time taken to reach 250m below sea level?

Answer 1

Answer:

20min.

Step-by-step explanation:

the elevator's position is 50m above ground level = +50m

it should reach = -250m(i.e. 250m below the sea level)

distance to be travelled = {50-(-250)}m = 300m

time taken to descend 15m = 1min

therefore, time required to descend 300m = 300/15 = 20mins.