An elevator descends into a mine shaft at the rate of 9 m per minute.I

1.	An elevator descends into a mine shaft at the rate of 9 m per minute.If the descent starts from 20 m above the ground level,how long will it take to reach -250m?
Answer» TOTAL distance = 250+20 (20 m above the ground and 250 below) = 270 Speed = 9 m/p T = d/s, = 270/9 = 30 MINUTES

An elevator descends into a mine shaft at the rate of 9 m per minute.If the descent starts from 20 m above the ground level,how long will it take to reach -250m?

Answer»

TOTAL distance = 250+20 (20 m above the ground and 250 below) = 270

Speed = 9 m/p

T = d/s, = 270/9 = 30 MINUTES

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An elevator descends into a mine shaft at the rate of 9 m per minute.If the descent starts from 20 m above the ground level,how long will it take to reach -250m?

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