A) 5
B) 20
C) 25
D) 15
Correct Answer: B
Solution :
Let age of Namrata\[=\,x\,yr\] \[\therefore \] Age of Namrata's father\[=\,4x\,yr\] According to question, \[4x+5=3(x+5)\] \[\Rightarrow \] \[x=10\] \[\therefore \] Age of Namrata\[=10\,yr\] and age of Namrata's father\[=40\,yr\] Let after y yr her father will be twice her age. \[\therefore \] \[\frac{10+y}{40+y}=\frac{1}{2}\] \[\Rightarrow \] \[20+2y=40+y\] \[\Rightarrow \] \[y=20\,yr\]You need to login to perform this action.
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