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# CBSE Class 9 Answered

Q.1 After 12 years Kanwar shall be 3 times as old as he was 4 years ago. find his present age? Q.2 The sum of the digits of a two-digit number is 8. When the digits are reversed the number increases by 18 what is the original number? Q.3 Carpenter charged Rs. 2500 for making a bed. The cost of materials used is Rs. 1100 and the and the labour charges Rs. 200/hr. Did how many hours did the carpenter work?
Asked by deeptimandawaria | 31 May, 2019, 01:17: PM
Expert Answer

Q.1: After 12 years Kanwar shall be 3 times as old as he was 4 years ago. find his present age?

Solution:

Let the present age of Kanwar be x years.

ACcording to the condition in the question, we get

x + 12 = 3(x - 4)

→ x + 12 = 3x - 12

→ 2x = 24

→ x = 12

Therefore the present age of Kanwar is 12 years.

Answered by Yasmeen Khan | 31 May, 2019, 03:09: PM

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