Suppose we represent the distance above the ground by a positive integer and that below the ground by a negative integer. then answer-
An elevator descends into a mine shaft at a rate of 5m per minute, If it begins from 15 m above the ground, what will be its position after 45 minutes?

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Answers

2014-09-18T23:10:05+05:30
The position of the elevator after 45 mins will be 210 m below ground.
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2014-09-19T18:16:55+05:30