Questions

A Sonar of a ship sends sounds waves of speed 1000 m/s. These waves are reflected back by the ocean floor in 2 seconds. Find the depth (in m) of theocean floor. 

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

A brain and nervous system that are poorly developed or insufficiently nourished means low grade of ______________ in our mental processes, just as a poorly constructed or wrongly adjusted motor means loss of power in applying the electric current to its work. We will, __________, look upon the mind and the brain as counterparts of ___________ other, each performing activities which correspond to activities in the other, ________ inextricably bound together at least so far as this life is concerned, and each getting its _______________ by its union with the other. This view will lend interest to a brief study of the brain and nervous system.

nourished means low grade of ______________ in our mental processes

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

Back to the drawing board

From the given four figures choose the correct water image of the below figure.

Gautam travels 160 kms at 32 kmph and returns at 40 kmph. Then average speed is

The bodies of penguins are _________________ and their feet have webs, making them good swimmers.

According to the categories of land mentioned in the Chola inscriptions ___________ was known as the land gifted to temples?

Who killed Mahatma Gandhi?