The cost price of an article is Rs. 800. After allowing a discount of 10 %, a gain of 12.5 % is made. Then the marked price of the article is 

If the velocity of a body is doubled its kinetic energy

A policeman starts to chase a thief. When the thief goes 10 steps the policeman moves 8 steps and 5 steps of the policeman are equal to 7 steps of the thief. The ratio of the speeds of the policeman and the thief is: 

In these questions read each sentence to find out whether there is any error in it. If there is no error, the answer is (D).

The principal forbade us (A) / not to use (B)/ the entire central hall. (C)/ No error (D).

Earth is divided into ______ longitudinal regions.

North India's first Bird ringing station is to come up in which state?