Question
‘A’ alone can complete a work in 50 hours. ‘A’
started the work alone and left after working on it for 30 hours. If ‘B’ completed the rest of the work in 20 hours then find the time taken by ‘A’ and ‘B’ together to complete the whole work.Solution
Let the total work = 200 units Then, efficiency of ‘A’ = (200/50) = 4 units/hour Work completed by ‘A’ alone in 30 hours = 4 × 30 = 120 units Remaining work = 200 – 120 = 80 units So, efficiency of ‘B’ = 80/20 = 4 units/hour Therefore, combined efficiency of ‘A’ and ‘B’ = 4 + 4 = 8 units/hour So, time taken by ‘A’ and ‘B’ together to complete the work = (200/8) = 25 hours
In which of the following ways, Infrastructure contributes to economic development?
(1) by increasing the productivity of the factors of product...
Under PMKVY, what is the maximum monetary reward a trainee can receive upon successful certification?
As per the Annual Report on PLFS 2020-21, what is the Worker Population Ratio (WPR) in India (Rural+Urban) in usual status?
A scheme, which aims at development of sustainable models of organic farming through a mix of traditional wisdom and modern science to ensur...
What was the theme of the National Voters’ Day Celebrated on 25th January 2024?
Government of India renamed the PTGs as Particularly Vulnerable Tribal Groups (PVTGs), there are how much PVTGs notified in the country?
Article 21-A of the Constitution of India and its consequent legislation, the Right of Children to Free and Compulsory Education (RTE) Act, of _________...
Which organization is responsible for managing the e-NAM platform?
Which organization manages the 'Prime Minister's Scholarship Scheme (PMSS)'?
Which of the following in not the eligible beneficiary under Prime Minister's Overarching Scheme for Holistic Nourishment Abhiyaan POSHAN 2.0: