Mathematics for IGCSE & O level - Ratio And Proportion (Section 4 - No. 34)
The sides of a rectangle are in the ratio 3:2. If the area of the rectangle is 54 cm², what is the shorter side’s length?
3 cm
6 cm
9 cm
12 cm
คำอธิบาย
Let sides be 3x and 2x. Area = 6x² = 54, x²=9, x=3. Shorter side = 2*3 = 6 cm.