Question
A is three times as old as B. C was twice as old as A four years ago. In four
years' time, A will be 31. What is the present age of B and C ?
Answer: Option B
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We have : A = 3B ...(i) and
C - 4 = 2 (A - 4) ...(ii)
Also, A + 4 = 31 or A= 31-4 = 27.
Putting A = 27 in (i), we get: B = 9.
Putting A = 27 in (ii), we get C = 50.
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