exam Maths Puzzle Numerical Ability

Barry Bonds hits a baseball and it travels for about 460 feet before it lands. (Assume that integer- valued measurements are correct to the nearest foot) If we ignore air resistanc

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A landscape designer has to design a retangular pad of concrete at the centre of a rock garden. The length must be less than or equal to twice the width; the perimeter must be less than or equal to 40m; and the area must be greater than or equal to 60m^2 Can you please help me solve this expression: {{{3xsqrt(4x^3)-5sqrt(x^3y)}}}