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Yongdao mathematics
Solution: (1) According to Xiao Liang's design scheme, the equation is: (52-x)(48-x)=2300.

Solution: x=2 or x=98 (truncation)

∴ The tunnel width in Liang Xiao design scheme is 2m;

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② Make AI⊥CD stand upright for me,

∫AB∨CD,∠ 1=60,

∴∠ADI=60,

∵ BC ∨ AD,

∴ Quadrilateral ADCB is a parallelogram,

∴BC=AD

X=2 from (1),

∴BC=HE=2=AD

In Rt△ADI, AI=2sin60 = root number 3.

∴ The total area of the four green spaces in Xiaoying's design scheme is 52×48-52×2-48×2+ (root number 3)? =2299 square meters.