Q:
      
      
         
            
The difference between the present ages of Avanthi and Kapil is 9 years. After 7 years, Kapil’s age is twice of Avanthi’s age. What will be Kapil’s age after 4 years?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: A) 15         
         
Explanation: Let the present ages of Kapil and Avanthi be K & A
Given difference in their ages = K - A = 9 years ...........(1)
After 7 years, K + 7 =  2(A + 7) ......(2)
K + 7 = 2A + 14
K - 2A = 7 ............(3)
K - A = 9 ....(1)
From (1) & (3),
-A = -2
=> A = 2 years
=> K = 9 + 2 = 11 years
 
Required, age of Kapil after 4 years = 11 + 4 = 15 years.
       
      
      
      
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