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astra-53 [7]
3 years ago
12

A circular track has a diameter of 62 yards, whats the circumference of the track

Mathematics
1 answer:
earnstyle [38]3 years ago
7 0

Answer:

194.78 yards

Step-by-step explanation:

Diameter: d=62yards

Perimeter: p=2×pi×r=pi×d, where d=2×r, r being the radius.

We get: p=pi×d=62×pi=194.78 yards

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\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad  y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad  variation
\end{array}\\\\
-------------------------------\\\\
\textit{we also know that }
\begin{cases}
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x=2
\end{cases}\implies 216=k2\implies \cfrac{216}{2}=k
\\\\\\
108=k\qquad therefore\qquad \boxed{y=108x}
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