<PRE><B>Question 822406</B>
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s = d / t
t = d / s
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descent time:
t = (2100 ft) / (1.5 ft/sec)
t = 1400 seconds
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time of landing:
3:30 pm = 03 hours and 30 minutes
30 minutes * (60 sec/min) = 1800 seconds
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start descent at:
1800 - 1400 = 400 seconds past 3 PM
400 seconds * (1/60 min/sec) = 6.666666 minutes
whole minutes in 6.666666: 6 minutes
(with 0.666666 minutes remaining)
(0.666666 min * 60 sec/min) = 40 seconds
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start descent at:
03:06:40 PM
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