PP-PS1完整詳解版-V2[1].0

Ofthattotalwhatwasthepriceofthebasiccomputer a1500

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Unformatted text preview: ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 69. 8112­!­item­!­187;#058&005781 The number of stamps that Kaye and Alberto had were in the ratio 5 : 3, respectively. After Kaye gave Alberto 10 of her stamps, the ratio of the number Kaye had to the number Alberto had was 7 : 5. As a result of this gift, Kaye had how many more stamps than Alberto? (A) 20 (B) 30 (C) 40 (D) 60 (E) 90 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 由由由由C 由由由由 由 Kaye 由x由 Alberto由y由 x:y=5:3 Kaye gave Alberto 10 of her stamps (x­10)由由y+10由=7:5 3x=5y 5(x­10)=7(y+10) X=150 y=90 (150­10)­(90+10)=40 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ ­­­­­­­­­­­­­­­­­­­­­­­ 70. 8158­!­item­!­187;#058&005842 The perimeters of square region S and rectangular region R are equal. If the sides of R are in the ratio 2 : 3, what is the ratio of the area of region R to the area of region S ? (A) 25 : 16 (B) 24 : 25 (C) 5 : 6 (D) 4 : 5 (E) 4 : 9 ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­ 由由由由B 由由由由 the sides of R are in the ratio 2 : 3由由R由由由由由由由由2x由3x 由由The perimeters of square region S and rectangular region R are equal (2x+3x)×2÷4=2.5x the area of region R to the area of region...
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