The shadow of a tower standing on a level plane to be 50 m longer when the sun 's altitude is 30 degree than when it is 60 degree.find the height of the tower.
(a)25m
(b)25 sqrt(3)m
(c) 23/sqrt(3)m
(d) 30m
A person bought 8 Kg. of rice for certain rupees.He sold 3 Kg at 10% profit,3 Kgs with neither profit nor loss and 2 Kgs at 5% loss. What is profit or loss in this transaction ?
Mathematics is a game played according to certain simple rules with meaningless marks on paper.
David Hilbert
Pure mathematics is the world's best game. It is more absorbing than chess, more of a gamble than poker, and lasts longer than Monopoly. It's free. It can be played anywhere - Archimedes did it in a bathtub.