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🎓 學業台小學及中學教育

wingyan

2007-11-14 4:28 am

If 2a=5b=4c,find a:b:c.

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回答 (3)

kevin

2007-11-14 4:39 am

✔ 最佳答案

2a = 5b
a/b = 5/2
∴a:b = 5:2

5b = 4c
b/c = 4/5
∴b:c = 4:5

a:b
b:c

= 5:2
4:5
∴a:b:c = 20:8:10
= 10:4:5

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Jasmie

2007-11-14 4:44 am

先找出佢地LCM(最少公陪數): 20
再睇佢地乘幾多會=20
2*10=20, 5*4=20, 4*5=20
所以a係10, b係4, c係5
ratio = 10:4:5

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HYDE CkK

2007-11-14 4:34 am

好似係2:5:4

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