Answers

2016-02-23T21:44:29+05:30
(I)  5

(ii) 30


is this correct

hope it helps
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2016-02-23T21:45:47+05:30
Let Sons age = x
Let Womens age = y

y - 5 = (x - 5)² -------------1
y + 10 = 2(x+10)----------2

Equation 1
y - 5 =x² - 10 x + 25
y = x² - 10x + 30

Equation 2
y = 2x +10

Substituting The Value Of y in equation 1
2x + 10 = x² - 10x + 30
x² - 10x - 2x + 30 - 10 = 0
x² - 12x + 20 = 0
x² - 2x - 10x + 20 = 0
x(x - 2) -10(x - 2) = 0
(x - 10)(x - 2) = 0
x = 10 or x = 2[ x cant be 2 as five years ago it would be negative age]

therefore, sons present age = 10
1. So sons age five years ago = 5yrs
Substituting The Value Of x in equation 2
y = 2x + 10
y = 2 * 10 + 10
y = 20 + 10
y = 30 yrs
2. Women Present Age = 30 yrs



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