P bought an article for Rs. 1600 and sold it at a profit of 10%. What would have been the increase in the profit percent if it was sold for Rs. 1840?

If ABCD is a Cyclic Quadrilateral ,then the value of $$\cos^2 A - \cos^2 B - \cos^2 C + \cos^2 D$$ is:

The child will be a male, if the zygote has an ........... combination.

If EFMIJ means DELHI, then the last letter of the word got by decoding IQBOS is

From the top of a platform 5 m high, the angle of elevation of a tower was $$30^\circ$$.If the platform was positioned $$40\sqrt{3}$$ m away from the tower, how tall was the tower?