Question

Five years ago, sandhya was thrice as old as Ratna. Ten years later, Sandhya will be twice as old as Ratna. How old is Ratna?

Answer 1

let us think that the age of sandhya is x yrs and ratna is y yrs
given , 5yrs ago
⇒x-5=3(y-5)
⇒x-3y= -10----------------------------------------eq 1
after 10yrs
⇒x+10=2(y+10)
⇒x-2y=10-----------------------------------------eq 2
eq 2----------------------------x - 2y= 10
eq 1----------------------------x - 3y= -10
                                         (-) (+)  (+)
                         --------------------------------
                                            y=20yrs
∴ratnas age =20 yrs

Answer 2

Step-by-step explanation:

this is the answer if u understood thank me