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Guru Pradhan

· started a discussion

· 1 Months ago

I can't understand this solution sir,have u any video clip than give me sir and have any other method than share me. (Question:663820.0)

I can't understand this solution sir,have u any video clip than give me sir and have any other method than share me.

Question:

The average age of a man and his son is 30 years. Four years ago, the ratio of their ages was 10:3. What is the difference between the present ages of the man and his son?

Options:
A) 28 years
B) 16 years
C) 26 years
D) 44 years
Solution:

Ans (a)

Let the present ages of man and son be M and S.

According to the question, 

\(\cfrac{(M +5)}{2}\)= 30

M + S = 60                                  ….(1)

Also,

\(\cfrac{M - 4}{S-4}=\cfrac{10}{3}\)=  10

10S - 3M = 28                              …(2)

On solving (1) and (2), we get

S = 16 and M = 44

Therefore, M - S = 28 years

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