An elevator descends into a mine shaft at the rate of 6 m/min. If the descendstarts from 20 meter above the ground level, how long will it take to reach - 340m?

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2016-04-10 07:21:23

it has to travel 20 meters before it gets to ground level, then another 340 meters till it reaches -340.....so it has to travel a total of 360 meters and if it descends at a rate of 6 meters per minute... 360/6 = 60 minutes....or 1 hr to reach -340 <==

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