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ad-work [718]
3 years ago
10

T varies inversely with the cube of W. When W is 3, T is 1/9. Find the value of W when T is 1/243

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
5 0
T varies inversely with the cube of W 

T = k/W^3

\frac{1}{9} = k/3^3

k = \dfrac{3^3}{9} = 3

W^3 = k/T

W = \sqrt[3]{ k/T }

When T=1/243

W = \sqrt[3]{ 3/(1/243)}= \sqrt[3]{729} = 9


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