3. The velocity of a train is given by the following table, time being reckoned in minutes from the start and velocity in metre per second. Find the distance covered by train in 15 minutes using Trapezoidal, Simpson's -1/3 and Simpson's-3/8 rules. time f (sec.) 0 5 10 IS 20 25 30 Velocity v (cm/sec) |5 |7 11 13.5 11.5 9 7.5