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If the original picture ratio is 2:3 and the new width is 20 centimetres, what will be the new height in the same proportion?

Answer and explanation

Correct answer: 30 centimetres

Assume the ratio is width:height = 2:3, as indicated by the width being given first. If 2 parts correspond to 20 centimetres, one part equals 20 ÷ 2 = 10 centimetres. The height is 3 parts, so 3 × 10 = 30 centimetres. The other choices use an incorrect ratio or calculation; therefore, option B is correct.

Related tags

Ratio Enlargement2 To 3Proportion CalculationArt ScalingProportionPrinciples Of ArtArt EducationClass 9 Mcq

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