Question

Q.21 the present ages of veeru and nerru was in the ratio 3:4.five years from now, the ratio of their ages will be 4:5.find their present ages.

Answer 1

Answer:

Age of Veeru = 15 year

           Nerru = 20 year

Step-by-step explanation:

     Let the present age of Veeru be 3a and that of Nerru be 4a.

Five years from now :

     Age of Veeru = 3a + 5

     Age of Nerru = 4a + 5

 According to the situation :

⇒ ratio of ages after 5 years = 4 : 5

⇒ ( 3a + 5 ) : ( 4a + 5 ) = 4 : 5

⇒ 5( 3a + 5 ) = 4( 4a + 5 )

⇒ 15a + 25 = 16a + 20

⇒ 25 - 20 = 16a - 15a

⇒ 5 = a

       Hence,

Present age of Veeru = 3a = 3(5) = 15

    age of Nerru = 4a = 4(5) = 20

Answer 2

Answer:

Age of Veeru = 15 year

           Nerru = 20 year

     Let the present age of Veeru be 3a and that of Nerru be 4a.

Five years from now :

     Age of Veeru = 3a + 5

     Age of Nerru = 4a + 5

 According to the situation :

⇒ ratio of ages after 5 years = 4 : 5

⇒ ( 3a + 5 ) : ( 4a + 5 ) = 4 : 5

⇒ 5( 3a + 5 ) = 4( 4a + 5 )

⇒ 15a + 25 = 16a + 20

⇒ 25 - 20 = 16a - 15a

⇒ 5 = a

       Hence,

Present age of Veeru = 3a = 3(5) = 15

    age of Nerru = 4a = 4(5) = 20