Question

47. I am twice as old as my sister Neha.
5
After seven years, my age will be
3
times of Neha's age. After 3 years, our
age difference will be:
(A) 17 years
(B) 7 years
(C) 11 years
(D) 14 years
(E) None of these​

Answer 1

Answer:

ANSWER

Let the son's age be x

Then , according to the condition,

father's age =3x+3

3 years later:

Son's age =x+3

Father's age =3x+3+3=3x+6

According to the condition given ,

3x+6=10+2(x+3)

3x+6=10+2x+6

x=10

Thus , the son's present age is 10 years and the father's age is

3x+3=3×10+3=33 years.

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Answer 2

let age of Arjun be

′

x

′

and age of Shriya be

′

y

′

then according to question x=2y−−−(1)

and five years ago

x−5=3(y−5)

x−5=3y−15

x−3y+10=0−−−(2)

using eq(1)

2y−3y+10=0

y=10

and x=20

∴ age of Arjun is 20 and age of Shriya is 10