A girl runs to save an injured cat stuck on a window frame which is \( 20 \mathrm{~m} \) above t...

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A girl runs to save an injured cat stuck on a window frame which is \( 20 \mathrm{~m} \) above the ground. In order to help the cat, the girl uses stairs to run at an angle of elevation of \( 45^{\circ} \).
The distance covered by the girl to reach the window frame is,
a. \( 20 \mathrm{~m} \)
b. \( 20 \sqrt{2} \mathrm{~m} \)
c. \( 10 \sqrt{2} \mathrm{~m} \)
d. \( 20 \sqrt{3} \mathrm{~m} \)
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