Question
18 years ago the average age of a family of four members
was 45 years. Two children were born in that span of 18 years. The present average age of the family remained unchanged. Among the two children who were born in between the 18 years, if the older child at present is 12 years more than the younger one, what is the respective ratio between the present age of the older child and the present age of the younger child?Solution
18 years ago, The sum of age of a family of four members = 45 × 4 = 180 years Now at present, The sum of age of four members = 180 + 18 × 4 =252 years Let the Present age of younger child be x years And the present age of older child = (x + 12) years Now, as per the question 252 + x + 12 + x = 45 × 6 2x = 270 – 264 2x = 6 x = 3 Present age of the older child = x + 12 = 3 + 12 = 15 years Present age of the younger child = x = 3 years Respective ratio = 15 : 3 = 5:1
Which banks have been retained as Domestic Systemically Important Banks (D-SIBs) by the RBI?
How much has India pledged to contribute to the United Nations Relief and Works Agency ( UNRWA ) for Palestine refugees for the 2024 - 25 period, and wh...
Which city will receive an investment of Rs 5,000 crore from Bajaj Finserv, according to the Memorandum of Understanding (MoU) signed with the Maharasht...
Which organization of India is responsible to develop a strong global connect and focus on the needs of the Indian economy as well as to serve as an int...
Who won the Best Actor Award at the 2025 Filmfare Awards?
What is the Labour Force Participation Rate (LFPR) in Current Weekly Status (CWS) for urban areas in June 2025?
Oxford University Press declares ______as Children’s Word of the Year 2021.
During the Deep Ocean Mission in August 2025, what was the maximum depth reached by an Indian aquanaut?
In which city was the country's first solar roof cycling track, named Healthway?
Who is set to inaugurate a new campus in Gurugram, according to a 2024 report?
Relevant for Exams:
