Q 11 :    

A person travelling on a straight line moves with a uniform velocity $v_1$ for a distance x and with a uniform velocity $v_2$ for the next $\frac{3}{2}x$ distance. The average velocity in this motion is $\frac{50}{7}$ m/s. If $v_1$ is 5 m/s then $v_2$ = __________ m/s.          [2025]