A converging lens of focal length 20 cm is seperated by 50 cm from a converging lens of focal length 5 cm. (A) Find the final positiom of the image of an object placed 40 cm in front of the first lens. (B) If the height of the object is 2 cm, what is the height of the final image. (C) Determine the image position of an object placed at 5 cm in front of the two lens in contact. I am having some issues with two lense problems. A)In A if the image is 40 cm infront of the first lens it is 10 from the second. The image will come up somewhere inbetween the two? Im assuming I need the equation 1/f=1/d0 + 1/di, but do I use it twice or what. B) This one isnt that bad, once I find A this shouldnt be an issue. C) Part C is sort of just like A, once I can figure out how to solve A this one shouldnt be that bad.