(A) : Magnitude of average velocity is equal to average speed, if velocity is constant.
(R) : If velocity is constant, then there in no change in the direction of motion.

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(A) is true but (R) is false

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

Both (A) and (R) are true and (R) is not the correct explanation of (A)

answer is A.

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Detailed Solution

Velocity is a vector quantity. If direction changes, velocity changes. So, if the velocity is constant , then its magnitude and direction do not change. If the direction of the motion is constant, speed is equal to the magnitude of the velocity and the average speed and magnitude of average velocity is same

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