Question

आपके लिये चुनौतीपूर्ण सवाल २४ घंटे में उत्तर दें। Total Marks 100 एक दादा एक बाप एक पोता तीनो की कुल उम्र 140 Years है। पोता जितना महीना का दादा उतना साल का पोता जितना दिन का बाप उतना सप्ताह का तो बताओ कौन कितने कितने साल का है ? Best Of Luck देखते हे अपने Group का Maths का बादशहा कौन हे

Answer 1

approximately the child is of 7 years dad is of 49 years and grandpa is of 74 years. it could never be found precisely as a leap year would add an additional day and in the question one equation includes days so i need the number of leap years.

Answer 2

For better calculation, considering all months is of 30 days , 
1 year = 360 days
Let Dada age be D days 
Baap age be B days 
Pota age be P days
A/q,
D + B +P = 140 ×360 days
now, Dada age in year = Pota age in months
so, D = 12 P
now, Baap age in week = Pota age in days
so, B = 7 P
now , from first equation,
D + B +P = 140 ×360 days
⇒12P + 7P +P = 140× 360
⇒20 P = 140 ×360
⇒P = 2520 days 
       = 2520/360 = 7 years
so, B = 7×P = 7×7 = 49 years
and , D = 12 P = 12× 7 = 84 years 
so, Pota years= 7 
      Baap = 49 years
      Dada = 84 years

hope this will help you :)