Question

John is 15 years old. In 1 year Mary
will be twice as old as John is today. How old is Mary today?​

Answer 1

Answer:

29

Step-by-step explanation:

15*2=mary age after one year

15*2-1=29

Answer 2

Answer:

29 yrs

Step-by-step explanation:

given that John's present age =15yrs

Let Mary's present age be 'x'

After one year

          x+1=2(15)

            x=30-1

              x=29

hence her present age is 29 yrs

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