An elevator deacends into mine shaft at the rate of 6m/min. If the descent starts from 10m above the ground level, how long will it take to reach -350?
An elevator descends into mine shaft at the rate of 6 meter per minute.
so for 1 min elevator descends 6 metres. the position of the elevator after one hour =We know 1 hour =60 min so 60min x 6metres=360 meters.. but the elevator began to descend from 10 meters above so, 360-10=350 -350 shows it is below the ground level