To find the volume of a prism, we need to multiply the area of the base by the height of the prism.
In this case, the base is a triangle with base 11cm and height 15cm, so its area is 1/2 * base * height = 1/2 * 11cm * 15cm = 82.5cm^2.
The height of the prism is given as 6cm.
Therefore, the volume of the prism is 82.5cm^2 * 6cm = 495cm^3.
Hence, the answer is 495cm^3.
