What is the distance in km of a quaser from which ligth takes 3.0 billion years to reach us ?

The farthest objects in out universe discovered by modern astronomeres are so distant that light emitted by them takes billions of year to reach the earth. These object (known as quasers) have may puzzling features, which have yet not been satisfactorily explained. What is the distance in km of a quasar form which light takes 3.0 billion years to reach us?

A bus from A to B covers a distance of 308km at a speed of 112km/hr .How much time is taken by the bus to reach B from A

Boojho walks to his school which is at a distance of 3 km from his home in 30 minutes. On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes. His average speed in km/h is

Two towns are at a distance of 240 km from each other. A motorist takes 8 hours to cover the distance if he travels at a speed of V_(0) km/h from town A to an intermediate town C, and then continues on his way with an acceleration of x km//hr^(2) . He needs the same time to cover the whole distance if he travels from A to C at V_(0) km/h and from C to B at V_(1) km/h or from A to C at V_(1) km/h from C to B at V_(0) km/h. Find V_(0) if the acceleration 'x' is double V_(0) in magnitude and V_(0) ne V_(1) .

From a quasar, light takes about 3 billion years to reach the surface of earth. Calculate the distance of quasar from the earth in light years.

Which one of the following is present today but was absent about 3.5 billion years ago ?