Dimensions 80655

The digital photo has dimensions of 640 × 480 pixels. Which of the classic photo paper formats is "most similar": 9 x 6 cm, 10 x 7 cm, 13 x 9 cm, 15 x 10 cm, 18 x 13 cm, or 30 x 20 cm?

Correct answer:

x = 18:13

Step-by-step explanation:

r=640:4801.3333=4:3 r1=9:6=1.5=3:2 r2=10:71.4286=10:7 r3=13:91.4444=13:9 r4=15:10=1.5=3:2 r5=18:131.3846=18:13 r6=30:20=1.5=3:2  Δ1=rr1=1.33331.5=610.1667 Δ2=rr2=1.33331.4286=2120.0952 Δ3=rr3=1.33331.4444=910.1111 Δ4=rr4=1.33331.5=610.1667 Δ5=rr5=1.33331.3846=3920.0513 Δ6=rr6=1.33331.5=610.1667  min Δ5  x=18:13

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