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- Hydraulics: Rotating Vessel
- Inverse Trigo
- Problems in progression
- General Solution of $y' = x \, \ln x$
- engineering economics: construct the cash flow diagram
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- Maxima and minima (trapezoidal gutter)
- Special products and factoring
- Newton's Law of Cooling
- Find the roots of the quadratic equation by differentiation method
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optimisation of surface area
optimisation of surface area for a cylinder of height 2.59mm and radius of 2.935mm has a chamfered top which height of 0.41mm and is chamfered at 45degrees.
Find the largest height which can be dipped in an acid without the acid touching the base of the cylinder?