The figure below shows the speed- time graph of a motor boat. Estimate the distance covered by the boat using:

(a) The trapezium rule with intervals of 2 seconds.

(b) The mid - ordinate rule with mid- ordinates at t= 2,6,10,14.

Time (seconds) 0 2 4 6 8 10 12 14 16
Speed (m/s) 0 2 5 9 15 25 18 14 11