Exams

Ozone hole is caused by chemicals like _____.

Two pipes, when working one at a time can fill a cistern in 2 hrs and 3 hrs, respectively while a third pipe can drain the cistern empty in 6 hrs. All the three pipes were opened together when the cistern was 1/6 full. How long will it take for the cistern to be completely full?

One of the roots of the equation x2 - 4x + k = 0 is x = 3. The other root is

A train moves at a speed of 35 m/sec and crosses a tunnel of length 960 metres, in 40 seconds. What is the length (in metres) of the train?

A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.

The cat caught a rat.

If CAR = 22 and BUS = 42, then TRAM = ?

The work done in one complete revolution of the moon around the earth is equal to

___ is a unit of length, roughly the distance from Earth to the Sun.