Question

hari is twice as old as is son twenty year's ago,he was four times as old as his son.find their present age

Answer 1

Solution:

Let the age of hari = h

and the age of son = s

hari is twice as old as his son------>h = 2s

twenty years ago...

h-20 = 4(s-20)(plug in h = 2s from the equation above )

2s-20 = 4(s-20)

2s-20 = 4s-80

4s-2s= 80-20

2s= 60

s= 60/2 = 30

so son's present age is 30 years

and hari's present age is 2* 30 = 60 years

Hope it helps!!!