Question

mary is three times older than nandhini after 10 years the sum of their ages will be 80 find their present ages

Answer 1

Let nadini age be = x years . Then Mary age will be = 3x years After 10 years according to Q's: X+10+3x+10 = 80 => 4x= 80-20 => x= 60=15 So present age of nandini = 15 years and Mary age will be 3x = 3*15= 45 years

Answer 2

Answer:

The present age of Nandini is 15 years and present age of Mary is 45 years.

Step-by-step explanation:

Let the present age of Nandini be x

Since we are given that the present age of Mary is three times the age of Nandini

So, present age of Mary = 3x

After 10 years Mary's age = 3x+10

After 10 years Nandini's age = x+10

We are given that after 10 years the sum of their ages will be 80

So, $3x+10+x+10=80$

$4x+20=80$

$4x=60$

$x=15$

Thus the present age of Nandini is 15 years

Present age of Mary = 3x = $3 \times 15 = 45 years$

Hence the present age of Nandini is 15 years and present age of Mary is 45 years.