LR Exam  >  LR Questions  >  A is three times as old as B. C was twice-as ... Start Learning for Free
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 are the present ages of B and C ?
  • a)
    9, 46
  • b)
    9, 50
  • c)
    10, 46
  • d)
    10, 50
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A is three times as old as B. C was twice-as old as A four years ago. ...
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.
View all questions of this test
Most Upvoted Answer
A is three times as old as B. C was twice-as old as A four years ago. ...
Solution:

Let's assume the present age of B is x.
So, the present age of A will be 3x.

1. C was twice as old as A four years ago
Let's assume the present age of C is y.
Four years ago, the age of A was (3x - 4) and the age of C was (y - 4).
According to the given statement, (y - 4) = 2(3x - 4)
Solving this equation, we get y = 6x - 4

2. In four years time, A will be 31
According to the given statement, (3x + 4) = 31
Solving this equation, we get x = 9
Substituting the value of x in y = 6x - 4, we get y = 50

Therefore, the present age of B is 9 and the present age of C is 50. Hence, the correct answer is option (B).
Explore Courses for LR exam
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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer?
Question Description
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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer? for LR 2025 is part of LR preparation. The Question and answers have been prepared according to the LR exam syllabus. Information about 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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for LR 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer?.
Solutions for 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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for LR. Download more important topics, notes, lectures and mock test series for LR Exam by signing up for free.
Here you can find the meaning of 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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of 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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer?, a detailed solution for 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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of 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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice 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 are the present ages of B and C ?a)9, 46b)9, 50c)10, 46d)10, 50Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice LR tests.
Explore Courses for LR exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev