1.An aeroplane was flying at a height of 1600m. From the time it started to land, it made a change of 70m in every minute. How many minutes will it take to descend to a height of 200m?
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Solution
An aeroplane was flying at a height of 1600m.From the time it started to land, it made a change of 70m in every minute. How many minutes will it take to descend to a height of 200m? ---- Decent distance: 1600m-200m = 1400m --- Decent time: 1400/70 = 20 minutes