A rocket is launched to travel vertically upward with a constant velocity of 20 m/s. After travelling for 35 seconds, the rocket develops a snag and its fuel supply is cut off. The rocket then travels like a free body. The height achieved by it is
An object is placed on the principal axis of a cortex lens of focal length 10 cm. If the distance of the object from the lens is 30 cm, what is the distance of the image formed?