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A regular tetrahedron tank has a height of 5 m and the triangular base sides are also all 5 cm. Calculate the volume in litres.
A regular tetrahedron tank has a height of 5 m and the triangular base sides are also all 5 cm. Calculate the volume in litres. (Give you answer correct to 2 decimal places) The 4 corners of a rectangular cover plate, 400 mm by 200 mm, are rounded to form sectors each with a radius of 20 mm. Determine the final area of the plate
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