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21-07-2016
Mathematics

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The area of a circular sun spot is growing at a rate of 600 km2/sec.
(a) How fast is the radius growing at the instant when it equals 4,000 km?

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Peehu08 Peehu08

21-07-2016

14 sec because In 2sec=600 In4 sec=1200 In6 sec =1800 In 8sec =2400 In10 sec=3000 In12sec=3600 In 14sec=4000 In 14seconds it covers 4000

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