Physics

Problem

A train starts from rest, accelerates uniformly at

1\,\text{m/s}^2

for

20\,\text{s}

, then moves with the attained speed for

10\,\text{s}

, and finally comes to rest with uniform retardation in

5\,\text{s}

. What is the total distance covered by the train? a)

650\,\text{m}

450\,\text{m}

400\,\text{m}

350\,\text{m}