Question

Mary 7 year younger than Sherlock and 9 years younger than David while they were done at 20 find the age of Ajay in Mary's 42 year old ​

Answer 1

Step-by-step explanation:

Let age of mary =m

Let age of her sister =s

Given that,  m=2s

After 5 years, mary will be 2 years older than her sister.

(m+5)=(s+5)+2

∴m=s+2

m=2s⇒s+2=2s⇒s=2

∴m=4

Mary is 4 years old and  her sister is 2 years old.

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