A and B are friend and their ages differ by 2 years. A\'s father D is twice as old as A and B is twi

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07 Aug 2013 Solve

A and B are friend and their ages differ by 2 years. A's father D is twice as old as A and B is twice as old as his sister C. The age of D and C Differ by 40 years. Find the ages of A.

OPtion

1) 18
2) 20
3) 21
4) 23
5) 26
6) 29
7) 31
8) 32
9) 36
10) None of these

Solution

By the given condition
A-B=2 (i)
Now as D is twice of 'A'
D's age = 2A years
and B is twice of his sister C
C's age = B/2 years
So D is older than C
2A-(B/2)=40 = 4A-B=80 (ii)
solve (i) and (ii) eq.
A=26

Correct Option: 5 Best Solution (0)