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?
Any substance that does not cause pollution and is capable of getting decomposed by any living organism is called as Bio degradable. Human & animal excreta, plant wastes etc... come under bio-degradable.
A shopkeeper purchased a chair whose marked price is Rs 1400, at two successive discount of 20% and 30% respectively. If he sells the chair for Rs 1176, then what is the profit percentage?