Time and speed

Q.

An auto travels the first half time with a uniform speed $u$ and the next half time with a uniform speed $v$. Find its average speed.

1. $uv$
2. $\frac{u+v}{2}$
3. $\frac{uv}{2}$
4. $2uv$

Q.

Is time a straight line?

Q.

Time is an example of:

1. Scalar

2. Vector

3. Scalar or Vector

4. Neither Scalar or Vector

Q.

Time is a __ quantity?