velocity and speed

Assertion: Both velocity and pseed have same dimesions. Reason: Velocity cannot be added to speed.

What is the numberical ratio of velocity to speed of an object ?

Which of the following are true ? (A) A body having constant speed can have varying velocity. (B) Position time graphs for two objects with zero relative velocity are parallel. (C) The numerical ratio of velocity, to speed of an object can never be more than one.

A stationary source emits a sound towards a wall moving towards it with a velocity u. speed of sound in in air = v. Find the fractional change in wavelength of the sound sent and the reflected sound.

A body is projected away from the earth's surface with a speed 3ve where ve is the escape velocity.The speed of the body at infinity will be:

Are the magnitudes of average velocity and average speed equal?

The ratio of the numerical values of the average velocity and average speed of a body is always.