The ratio of the ages of A and B seven years ago was 3:4 respectively. The ratio of their ages nine years from now will be 7:8 respectively.what is B's age at present ? A) 16 B) 19 C) 28 D) 23
Let the age of a nd b be 3x nd 4x..
Total years from past to after 9 yrs will b..7+9=16
So tht it came equal to the given ratio 7:8 in ques.
See the equation..
So the age of x 7 yrs before is..4x=4*4=16
So present age will b 16+7=23
Answer is D
Pls help me to find the answer..