Question
A group of workers, all equally efficient, were assigned to
complete a job in 16 days. However, 10 workers left the job at the end of each day. Despite this, the job was completed by the end of the 24th day. How many workers were there initially?Solution
Let total number of workers originally be ‘n’ and efficiency of each worker is 1 unit/day
So, total work = 16n units
So, 16n = n + (n – 10) + (n – 20) + ……. till 24 days
16n = 24/2 × [2n + (24 – 1) × (-10)]
16n = 12 × (2n – 230)
16n – 24n = -(12 × 230)
So, n = 345
Who has become the youngest bowler to take 400 T20 wickets?
Which two coal mines in India are ranked among the world's 10 largest?
Which state launched the first night navigation mobile application in rivers in the country for ferries plying on Brahmaputra River?
Luiz Inacio Lula da Silva has taken over as the _____ President of Brazil in 2022?
Which set correctly identifies the Partner Countries for World Food India 2025?
The recent RBI $5 billion USD/INR swap is expected to drain approximately how much liquidity from the system?
What was the theme for Nasha Mukt Bharat Abhiyaan Run on the occasion of international day against drug abuse this year?
According to the Goldman Sachs Group Inc. the Gross domestic product may expand by ___% in calendar year 2023 from an estimated 6.9%.
What areas of cooperation are covered by the Memorandum of Understanding (MoU) signed between India and Saudi Arabia in the field of energy recently?
KYC guidelines issued under:
Relevant for Exams:
