The minimum price at which I was willing to sell my old TV was Rs 37,000. I quoted Rs 50,000 while selling it, but it sold for Rs 42,000. This transaction generated _____.
An object of 1.2 cm height is placed 30 cm before a concave mirror of focal length of 20 cm toget a real image at a distance of 60 cm from the mirror. What is the height of the image formed?