A train start to move from rest and then it gets constant acceleration .It cross next two 900 meters in orderly 50 sec and 40 sec.please someone draw a velocity vs time (VT) graph to this case.
some basic information regarding motion with uniform acceleration ...
a velocity vs. time graph with constant acceleration is linear
$\displaystyle v = v(0) + at$
displacement is a quadratic function
$\displaystyle \Delta x = v(0) \cdot t + \frac{1}{2}at^2$