An embankment of side slope 1.5 H: 1 V is to be constructed. The depth at center at different chainages is shown in the table below. Width at top of embankment is 30 m.

Chainage (m)	100	200	300	400
Depth (m)	3	4.5	6	7.5

If the ground is levelled in transverse direction to center line of the road, calculate the total volume (in m³) of earth required for the embankment by trapezoidal method.