Mathematics for IGCSE & O level - Ratio And Proportion (Section 2 - No. 48)
The ratio of the sides of a triangle is 2:3:4 and the perimeter is 45 cm. What is the length of the shortest side?
5cm
10cm
15cm
20cm
Explanation
Perimeter: 2+3+4=9. Shortest side is ratio of 2. 45/9=5. 2*5 = 10
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