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Introduction: Decimal

1.An aeroplan...

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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?
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Decent distance: 1600m-200m = 1400m
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Decent time: 1400/70 = 20 minutes

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