CBSE Class 7 Answered
Mr. Ranjan is seven times as old as his son. 10 years hence, he will be three times as old as his son. Find their ages.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
Let the son's age be x years.
Mr. Ranjan's age is 7x years.
After 10 years, his son's age will be = (x + 10) years
After 10 years, Mr. Ranjan's age will be = (7x + 10) years
By the given condition,
(7x + 10) = 3(x + 10)
7x + 10 = 3x + 30
7x - 3x = 30 - 10
4x = 20 or x = 5
Son's age is 5 years.
Mr. Ranjan's age is 7 
5 = 35 years
Answered by | 04 Jun, 2014, 03:23: PM
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