9. An aeroplane was flying at a height of 1600m. From the time it started to land, it made a
change of 70 m in every minute. How many minutes will it take to descend to a height of
200 m ?
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Answer:
For 1 min it will descent by a height of 70m
To descend to a height of 200m it should descend a height of 1600−200=1400m
No. of minutes it will take = 70 /1400
=20 min
Step-by-step explanation:
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