Ex 2.4, 10 Aman's age is three times his son's age. Ten years ago he was five times his son's age. Find their present ages.Let Aman's son's present age be x
Then, Aman's present age is 3x
Ten years ago,
Aman's age = 3x 10
Aman's son's age = x 10
Given,
Ten years ago, he was five times his son s age
Aman's age = 5 Aman's son's age
3x 10 = 5 (x 10)
3x 10 = 5x 50
3x 10 + 50 = 5x
3x + 40 = 5x
40 = 5x 3x
40 = 2x
x = 40/2
x = 20
Hence,
Aman's Son's age = x = 20 years
A man's age = 3x = 3 20 = 60 years

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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