1.

The ratio of A's age 3 years ago and B's age 5years ago was 4 : 5. If A is 4 years youngerthan B then what is the present age of B?​

Answer»

Step-by-step explanation:

  1. LET n be the common factor in the given ratio
  2. AGE of A 3 years ago=4n
  3. age of B 3 years ago=5n
  4. as a is 4 years younger than B so the age of A three years ago=5n-4
  5. now we can equate the values
  6. we have,

4n=5n-4

n=4

  1. age of B three years ago=5n=5x4=20
  2. required present age of B=20+3=23

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