Question
‘A’ alone can complete a work in 40 hours. ‘A’
started the work alone and left after working on it for 20 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 = 360 units Then, efficiency of ‘A’ = (360/40) = 9 units/hour Work completed by ‘A’ alone in 20 hours = 9 × 20 = 180 units Remaining work = 360 – 180 = 180 units So, efficiency of ‘B’ = 180/20 = 9 units/hour Therefore, combined efficiency of ‘A’ and ‘B’ = 9 + 9 = 18 units/hour So, time taken by ‘A’ and ‘B’ together to complete the work = (360/18) = 20 hours
Elon Musk Founded a company in 2002 in ____.
In which year did Abhinav Bindra win his Olympic Gold Medal?
Which of the following taxes is proportional in nature?
Consider the following statements:
1. Population change in an area is an important indicator of economic development of that region.
2. Po...
The intervention of the government whether to expand demand or reduce it constitutes the ___________.
Which of the following committee had recommended the consolidation of banks -:
What is the upgraded name of the Integrated Grievance Redressal System (IGMS) launched in 2011?
What is the retirement age for the CJI ( Chief Justice of India)?
- Name the person from India in TIMES 100 most influential persons list?
Substances like phosphorus burns in air at room temperature. This type of combustion in which a material suddenly bursts into flames, without applicati...
