Question
‘X’ is 25% more efficient than ‘Y’, and ‘Z’
is 25% less efficient than ‘Y’. Together, they can complete a job in 40 days. If X and Y work together for 30 days, how long will Z take to finish the remaining work?Solution
Let efficiency of ‘Y’ be ‘x’ units/day Efficiency of ‘X’ = 1.25x units/day Efficiency of ‘Z’ = 0.75x units/day Total work = (1.25x + x + 0.75x) × 40 = 120x units Work done by X and Y in 30 days = 30 × (1.25x + x) = 67.5x units Remaining work = 120x – 67.5x = 52.5x units Time taken by Z = 52.5x ÷ 0.75x = 70 days
The gene responsible for dwarfing in rice is
central soil salinity research institute is located at
Level of optimum production is available at
Excellent source of nitrogen in groundnut is
Which of the following is a dicotyledonous weed?
The difference between value in use and value in exchange is:
Cocconut contains how much percentage of oil?
Hopper burn is a symptom of _____
When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly disappears. This is due to the formation of which mo...
Chhena of better quality is prepared from
Relevant for Exams:
