maxmohammed020 maxmohammed020

21-03-2021
Mathematics

contestada

The cost of the circular carpet, $C, varies as the square of the radius,
r metres. If C = 200 when r= 2
Find the cost of the circular carpet when r= 3

Respuesta :

reeserl reeserl

21-03-2021

Answer:

$450

Step-by-step explanation:

C = k[tex]r^{2}[/tex]

200 = k([tex]2^{2}[/tex]) = 4k

k = 50

C = 50[tex]r^{2}[/tex] = 50([tex]3^{2}[/tex]) = 50(9) = $450

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