It is desired to project an image of an object four times actual size with a lens of focal length 20 cm. What object distance should be used?
A)100 cm
B)80 cm
C)4 cm
D)25 cm
E)5 cm

Question

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The Answer of It is desired to project an image of an object four times actual size with a lens of focal length 20 cm. What object distance should be used?
A)100 cm
B)80 cm
C)4 cm
D)25 cm
E)5 cm

It Is Desired to Project an Image of an Object