Question

If c is inversely proportional to d ,when c=10 and d=6 .What is the value of d when c=20

Answer 1

Answer:

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If c is inversely proportional to d ,when c=10 and d=6 . What is the value of d when c=20

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$for \: inverse \: proportion \: \\ cd = k (constant)$

$c =10 \\ d = 6 \\ k = cd \\ = > k = 10 \times 6 \\ = > k = 60$

$therefore \\ c = 20 \\ k = cd \\ d = \frac{k}{c} \\ putting \: there \: values \\ \\ d = \frac{60}{20} \\ \\ d = 3$

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