Multiple Choice
Tan's face is 20 cm in front of a concave shaving mirror.If he observes his image to be twice as big and upright,what is the focal length of the mirror?
A) 10 cm
B) -40 cm
C) -50 cm
D) 40 cm
E) 50 cm
Correct Answer:
Verified
Correct Answer:
Verified
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