A concave mirror forms an image of \( 20 \mathrm{~cm} \) high object on a screen placed \( 5.0 \...

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A concave mirror forms an image of \( 20 \mathrm{~cm} \) high object on a screen placed \( 5.0 \mathrm{~m} \) away from the mirror. The height of the image is \( 50 \mathrm{~cm} \). Find the focal length of the mirror and the distance between the mirror and the object.
(a) \( 1.43 \mathrm{~m}, 2 \mathrm{~m} \)
(b) \( 2 \mathrm{~m}, 1.43 \mathrm{~m} \)
(c) \( 5 \mathrm{~m}, 2.5 \mathrm{~m} \)
(d) \( 2.5 \mathrm{~m}, 5 \mathrm{~m} \)
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