book Maths Puzzle Numerical Ability

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Please help me put this word problem into Algebra form and solve.

Area of Rectangle. The width of a rectangle is fixed at 16yd. For what lenghts will the area be at

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A coffee filter for a new coffee maker is to be designed using a conical filter. The filter is to be made from a circle or radius 10cm with a sector cut from it such that the volum how do you form 5 eqilateral triangles using 9 sticks of equal length?