self Maths Puzzle

a metallic cuboid of dimensions 27x18x12 m is melted.find the minimum amount of the volume of molten metal which should be added to mould it into a cube whose edge is 'a' cm where a is an integer.

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self Other Question

At time t= 0, a projectile was fired upward from an initial height of 10 feet. Its height after t seconds is given by the function h(t)=p-10(q-t)^2, where p and q are positive constants. If the projectilereached a maximum height of 100 feet when t= 3, then what was the height, in feet, of the projectile when t= 4 ? 5,1,2,8,8,1,0,9,9,3,?