An elevator descends into a mine shaft at the rate of 7m/min. If the descent starts from 5m above the ground level, how long will it take to reach -205 m?
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Answer:
30 min
Step-by-step explanation:
Descending rate per min= 7m
Start of decending of elevator= 5m
Time taken to reach -205m = 205+5
= 210m
= 210÷7
=30 min
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