Adam who is 20 years old is 4 times as old as Mary. What will be Mary s age when Adam is twice as old as her?

Adam who is 20 years old is 4 times as old as Mary. What will be Mary

1.	Adam who is 20 years old is 4 times as old as Mary. What will be Mary s age when Adam is twice as old as her?
A.	35 years
B.	15 years
C.	30 years
D.	17 years
Answer» C. 30 years

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Adam who is 20 years old is 4 times as old as Mary. What will be Mary s age when Adam is twice as old as her?

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