Question

pls explain if ur intelligent​

Answer 1

Answer:

son = x, dad = y, grandfather =z

=> x+y+z=140

=> age of grandson in months = grandfather in years

=> 12*x = z

=> age of grandson in days = dad age

=> 365*x = (365*y)/7

=> 7x= y

=> x+y+z=140

=> x+7x+12x=140

=>20x=140

=> x=7 year

=> y=7x = 7*7 = 49 year

=> z = 12x = 12*7 = 84 year