Question

3. Mary is twice as old as john and half as old as Bob. In 22 years’ time Bob will be twice as old as John. How old is Mary?

Answer 1

39595

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Answer 2

Answer:

22

Step-by-step explanation:

let John's age is x and bob's y

mary's age = 2x=y/2............(1)

After 22 years.......john's age is x+22 and bob's age is y+22

According to given info.  2(x +22) = y +22

from (1) y = 4x

i.e., 2x + 44 = 4x + 22

4x + 44 = 2x + 22

2x  = 22

x = 11

Mary's age is 2x i.e., 2*11 = 22