Rahul is 30 years older than his daughter Mary. In 20 years Rahul will be twice as old as Mary. What is Mary current age.  Choose the correct choice from the following choices:	A) 12	B) 14	C) 10	D) 16	E) 18
Now: Mary = x, Rahul =x+30   In 20 years Mary = x+20, Rahul= x+30+20 or 2(x+20)   x+30+20= 2(x+20)   x+50=2x+40   50-40=2x-x   x= 10   Mary is 10 years old   Answer : 10
<result>C</result>
Rahul is 30 years older than his daughter Mary. In 20 years Rahul will be twice as old as Mary. What is Mary current age.