gracelin408junkmail gracelin408junkmail

17-08-2020
Mathematics

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82.) a varies directly as b and inversely as the square of c, and a=10, when b=8 and c=2. Find a when b=20 and c=5.
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Ankit221005 Ankit221005

17-08-2020

Step-by-step explanation:

According to rules of Proportionality :

[tex]a = k \frac{b}{ {c}^{2} } [/tex]

(A) When (a = 10, b = 8, c = 2)

K = 5

(B) When (b = 20, c = 5)

[tex]a = 5 \times \frac{20}{25} = 4[/tex]

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