Question

Chandrika is now 12 years old and piyush is 4 year old. in how many year will chandrika be twice as old as Piyush

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Answer 1

Let number of years be x; then,

reqd. equation => 12+x = 2(4+x)

or, 12 + x= 8 + 2x

or, x = 4

Hence the answer is 4 years.

HOPE THIS COULD HELP!!!

Answer 2

Present Chandrika age = 12 yrs

Present Piyush age = 4 yrs

Let after n yrs Chandrika is twice old as Piyush

Then

12 +n = 2(4+n)

12 + n = 8 +2n

n = 12-8= 4

After 4 yrs Chandrika is twice old as Piyush