Question

ratio between Rudra's present age and his age 12 yrs back is 5:2.The ratio of his present age and his father's age 5 yrs back is 4:9.How old is his father today
a) 50 yrs
b) 55 yrs
c) 60 yrs
d) 65 yrs
e) 56 yrs ​

Answer 1

Answer:

Rudra father's age is 50

Step-by-step explanation:

Rudra's present age is 'x'

case(1)

x : x-12 = 5 : 2

x / x-12 = 5/2

2x = 5x-60

3x = 60

x = 20

Now Rudra's age is 20

Rudra father's age is 'y'

case (2)

20 / y-5 = 4/9

4y-20 = 180

4y = 200

y = 50

Rudra father's age is 50