Why are oceans are blue in colour?
May 9, 2015, 1:59 p.m. Ratings : 5.0

Name the principle on which a rocket works.
Oct. 7, 2015, 8:47 p.m. Ratings : 5.0

ABCD is a square and ABE is an equilateral triangle outside the square. Prove that angle ACE =half of angle ...
Oct. 12, 2015, 7:04 p.m. Ratings : 5.0