CBSE Class 11-science Answered

The rotation of the earth has no measurable bearing on time of flight.  Inertially, we start out already moving with the earth. There is not force that wants to slow us down relative to the earth's rotation. 
For example, the atmosphere basically moves with the earth, it does not sit stationary while the earth rotates within it (creating a several hundred mile per hour wind).  For example, if you're riding in a bus, and throw a ball from the front to the back of the bus it takes the same time to throw it forward as it does backwards.  From the point of view of a person on the street, it appears that in one instance the ball has traveled farther and faster than in the other. But since the air in the bus is also moving with the bus, there is no time difference between the two throws.