AP EAMCET Engineering 22 Apr 2019 Shift 1 Paper

A body travelling along a straight line path travels first half of the distance with a velocity 7 ms−1. During the travel tune of the second half of the distance, first half time is travelled with a velocity 14 ms−1 and the second half time is travelled with a velocity 21 ms−1. Then the average velocity of the body during the journey is