5.
Diagram NOT accurately drawn
The diagram shows a prism of length 90 cm.
The cross section, PQRST, of the prism is a semi-circle above a rectangle.
PQRT is a rectangle.
RST is a semi-circle with diameter RT.
PQ = RT = 60 cm.
PT = QR = 45 cm.
Calculate the volume of the prism.
Give your answer correct to 3 significant figures.
State the units of your answer.
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(Total 5 marks)