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Question Number 97033 by joki last updated on 06/Jun/20

Answered by mr W last updated on 06/Jun/20

Commented by mr W last updated on 06/Jun/20

$$greenline=\sqrt{r^2-{\left(\frac{a}{2}\right)}^2}=a-r$$$$-{\left(\frac{a}{2}\right)}^2=a^2-2ar$$$$\Rightarrow r=\frac{5}{8}a=\frac{5\times 10}{8}=\frac{25}{4}=6.25$$

Commented by joki last updated on 06/Jun/20

$$thankyousir$$

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