有問題關於maths(ratio)

2007-01-28 11:15 pm

我想問呢幾題maths點做呀(要steps)
Ratio:
Siimplify each of the following ratios.
1. 30 seconds:1 hour
2. 6 weeks and 3 days:1 week and 5 days
Find the value of each of the following unknowns
1. a:9 = 5:3
2. 5:12 = c:30
3. 91:143 = 14 :b
4. d days : 3 weeks = 8 days : 3 weeks and 3 days

更新1:

3. A sum of $16 000 is divided between Wilson and Sherman in the ratio of 4:6. How much money does Wilson get?

回答 (1)

myisland8132

2007-01-28 11:23 pm

✔ 最佳答案

1
30 seconds:1 hour
= 30 seconds: 3600 seconds
=1: 120
2
6 weeks and 3 days:1 week and 5 days
=45 days : 12 days
=15: 4
1
a:9 = 5:3
3a=45
a=15
2
5:12 = c:30
12c=150
c=12.5
3
91:143 = 14 :b
91b=2002
b=22
4
d days : 3 weeks = 8 days : 3 weeks and 3 days
d days : 21 days = 8 days : 24 days
d days : 21 days = 1:3
d=7

2007-01-28 15:38:50 補充：
3. A sum of $16 000 is divided between Wilson and Sherman in the ratio of 4:6. How much money does Wilson get? Wilson gets16000*4/(4+6)=6400Sherman gets16000-6400=96000

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