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Q8. A solid of revolution is formed when the area bounded by the curve y = 2x² + 3 and the lines y = 1, x = -1 and x = 2, as shown by the shaded area in Fig Q8, is rotated about the

x-axis through one complete revolution.

The dimensions are in centimetres.

Calculate EACH of the following for this solid of revolution:

(a) its volume; (12)

(b) its mass, if its density is 2720 kg m^-3. (4)