Question
‘A’ and ‘B’ alone can do a certain work in 30
days and 40 days, respectively. Both started the work together but after ‘x’ days ‘A’ left the work and the rest work was completed by B alone in ‘2x’ days. Find the total time taken to complete the whole work in this way.Solution
Total work = 120 units (LCM of 30 and 40) Efficiency of ‘A’ = 120/30 = 4 units/day Efficiency of ‘B’ = 120/40 = 3 units/day According to the question, ‘A’ worked for ‘x’ days and ‘B’ worked for ‘2x days. Therefore, (4+3)x + 3 × 2x = 120 Or 7x + 6x = 120 Or x = 120/13 total time taken to complete the whole work = 3×120/13 =360/13 days =27.69days
Which of the following states comes under the Western Dedicated Freight Corridor?
DFCCIL received US$ ______ billion for the construction of the Eastern Corridor in 2014.
Indian Railway Institute of Civil Engineering is located at:
Which of the following mountain railways in India was declared a World Heritage Site by UNESCO in the year 1999?
Which one of the following States does NOT have the Headquarters of any Railway Zone?
What is the name of the mobile application recently launched by Indian Railways for passenger safety?
When was the Southern Railway zone created?
The Canadian Pacific Railway runs between ________________________
The Chittaranjan Locomotive Works factory commenced the production of steam locomotives on:
The Indian Railways carried 1108.79 million tonnes of freight in:
