two nos are in 5:7 if 7is added to each number the ratio becomes 11:15 find the number
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2
Step-by-step explanation:
Answer:
numers are 18 and 8
Step-by-step explanation:
x:y=9:4
4x=9y
x=9y/4.1
x+7/y+7=5/3
3(x+7)=5(y+7)
3x+21=5y+35
3x-5y=14
3*9y/4-5y=14
27y/4 -5y=14
27y-20y=14*4
7y=56
y=8
x=9*8/4
x=18
Answered by
2
Given,
- Two numbers are in Ratio 5 : 7
- 7 added two Each number
- After Adding 7, The Ratio converted into 11 : 15
Procedure,
Before Adding 7,
Let's The First Number = 5X
So, The Second Number = 7X
After Adding 7,
The First Number become = 5X + 7 (1)
The Second Number become = 7X + 7 (2)
Solution,
The First Number become = 5X + 7 (1)
The Second Number become = 7X + 7 (2)
And, There Ratio = 11 : 15
=> (5X + 7) / (7X + 7) = 11 / 15
=> 15 (5X + 7) = 11 (7X + 7)
=> 75X + 105 = 77X + 77
=> 105 - 77 = 77X - 75X
=> 28 = 2X
=> X = 7
Answer,
The First Number = 5X = 5 × 7 = 35,
The Second Number = 7X = 7 × 7 = 49
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