1. If 4a=5b and 3b=4c, find a:b:c
2.If the ration of the perimeter of square A to that of square B is 3:5, find the ratio of the side of square A to taht of square B.-->唔識寫過程
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Rate & Ratio
2007-10-19 9:54 pm
回答 (2)
2007-10-19 10:01 pm
✔ 最佳答案
1. 4a = 5b and 3b = 4c So, a = 5b / 4 and c = 3b / 4
Therefore, a : b : c
= 5b / 4 : b : 3b / 4
= 5 : 4 : 3
2. Let x be the side of square A
y be the side of square B
So, 4x : 4y = 3 : 5
x : y = 3 : 5
So, the required ratio is 3 : 5
參考: Myself~~~
2007-10-19 10:01 pm
1.
4a = 5b ==> a:b = 5:4
3b = 4c ==> b:c = 4:3
a:b:c = 5:4:3
2.
Let a be the side of square A and b be the side of square B.
Perimeter of two squares are 4a and 4b
4a:4b = 3:5
a:b = 3:5
Hence ratio fo the side of square A to that of B is 3:5
4a = 5b ==> a:b = 5:4
3b = 4c ==> b:c = 4:3
a:b:c = 5:4:3
2.
Let a be the side of square A and b be the side of square B.
Perimeter of two squares are 4a and 4b
4a:4b = 3:5
a:b = 3:5
Hence ratio fo the side of square A to that of B is 3:5
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