Question 751040
mother is 30 yrs older than her daughter 
after ten yrs mother will be 40 yrs and daughter will be 10 yrs 
difference of age  between mother and daughter will remain as  40-10 =30 yrs
when daughter is 30 yrs old 
mother will be 60 yrs 
therefore mother will be two times of daughter age  
ANSWER two times