a converging lens of focal length 15 CM placed at a distance of 20 cm

1.	a converging lens of focal length 15 CM placed at a distance of 20 cm from a screen how far the lens should be placed so form a real image on the screen
Answer» ANSWER: I THINK answer is 30CM so

a converging lens of focal length 15 CM placed at a distance of 20 cm from a screen how far the lens should be placed so form a real image on the screen

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ANSWER:

I THINK answer is 30CM so

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a converging lens of focal length 15 CM placed at a distance of 20 cm from a screen how far the lens should be placed so form a real image on the screen​

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a converging lens of focal length 15 CM placed at a distance of 20 cm from a screen how far the lens should be placed so form a real image on the screen