Question

7 years ago, the ratio of the ages of Anirudh to that of Bhavana, was 7:9. Chandhu is 12 years older than Anirudh and 12 years younger than Bhavana. What is Chandhu's present age?
A) 91 years
B) 115 years
C) 103 years
D) Can't be determined

Answer 1

Hey mate ^_^

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Answer:
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Let present Anirudh's age be 'x' and Bhavana's age be 'y'

Given seven years, their ratio is $7 : 9$

$x-7 : y-7 = 7 : 9$

$9x - 7y = 14 ---- (1)$

Now,

Chandhu is 12 years older than 'x' and 12 years younger than 'y'

$C = x + 12 ---- (2)$

$y = C + 12$

$y = x + 12 + 12 ---- [From (2)]$

$y = x + 24 ---- (3)$

$Put (3) in (1)$

$9x - 7(x+24) = 14$

$9x - 7x - 168 = 14$

$2x = 182$

$x = 91 years$

Now,

Substitute 'x' in equation (2)

$C = x + 12$

$C = 91 +12$

$C = 103 years$

Therefore,

Correct option C) $103 years$

#Be Brainly❤️

Answer 2

Q:

7 years ago, the ratio of the ages of Anirudh to that of Bhavana, was 7:9. Chandhu is 12 years older than Anirudh and 12 years younger than Bhavana. What is Chandhu's present age?

A) 91 years
B) 115 years
C) 103 years
D) Can't be determined

Answer:   C) 103 years 

Explanation:

Let present Anirudh's age be 'A' and Bhavana's age be 'B'
Given seven years, their ratio is 7:9
=> A-7 : B-7 = 7 : 9
=> 9A - 7B = 14 .......(1)
And given,
Chandhu is 12 years older than A nad 12 years younger than B
=> C = A + 12....(2)
=> B = C + 12
=> B = A + 12 + 12 .....(From (2))
=> B = A + 24 ....(3)
Put (3) in (1)
9A - 7(A+24) = 14
9A - 7A - 168 = 14
2A = 182
=> A = 91 years
=> C = A + 12 = 91 +12 = 103 years.