An elevator descends into a shaft at the rate of 3m/min. If the descent starts from 40m above the ground level, how long will it
take to reach -20m?
1 answer:
Answer:
20 m
Step-by-step explanation:
distance = 40 m + (20 m under) = 60m
x min = 60 m
1 min = 3 m
x min = (60) (1) / 3
x = 20 min
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