11. An elevator descends into a mine shaft at the rate of 6 m/min. The descent starts from
10 m above sea level.
(1) Where will it reach in 20 minutes?
(11) How long will it take to reach a depth of -350 m?
Answers
Answered by
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Answer: (i) -110m
(ii)1 hour
Step-by-step explanation:
(i)
in 20 min. it will travel a distance = 6 x 20
=120m
right now it is at +10m
after 20 min= +10 - 120 = -110m
(ii)
to get to -350m,
distance travelled would be= 350+10=360m
time to travel 360m = 360/6 = 60min =1 hour
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