Question

An object moves in straight line along x-axis, it's distance from the origin is given by x=10t^2m.The average velocity in the time interval from t=2s to t= 3s is?

Answer 1

$x = 10 {t}^{2} \\ average \: velocity = \frac{x(t2) - x(t1)}{t2 - t1} \\ av.vel. = \frac{90 - 40}{3 - 2} \\ = 50m {sec}^{ - }$
hope it will help u..