Question

the ages of Rahul and Lakshmi are in ratio, 5:7 after 4 years later the sum of their ages will be 56 years find their present ages

Answer 1

Let rahul age = 5x
Lakshmi’s age=7x
4 years later

(5x+4)+(7x+4)=56
12x+8=56
12x=56-8
12x=48
X=48/12=4

So... Rahul’s age=5*4=20 years
Lakshmi’s age=7*4=28 years