Trapezoidal Prism with Cylindrical Hole – Volume & Surface Area
Trapezoidal Prism with Cylindrical Hole – Volume & Surface Area
Secondary 1
The solid consists of a trapezoidal prism with a cylindrical hole of radius \(10\) cm in the centre. Given that \(AB=25\) cm, \(EF=75\) cm, \(FG=28\) cm, \(CF=DE=93.41\) cm and the height of the solid is \(90\) cm.
- Calculate the total volume of the solid.
- Calculate the total surface area of the solid.
- The solid is melted and recast into a cylindrical solid of height \(40\) cm, find the radius of the solid.
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Answer:(a) \(117\,000\text{ cm}^3\) (3 s.f.) (b) \(18\,200\text{ cm}^2\) (3 s.f.) (c) \(30.5\text{ cm}\) (3 s.f.)
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