Question
Working alone, ‘X’ and
‘Y’ can complete a work in 16 days and 10 days, respectively. They started working together but after 4 days, ‘Y’ was replaced by ‘Z’ and the work got finished in the next 4 days. Find the time taken by ‘Z’ alone to finish the whole work.Solution
Let the total work be 80 units (LCM of 16 and 10).
Combined efficiency of X and Y = 5+8=13 units/day. Work done by X and Y together in 4 days = 13×4=52 units. Remaining work = 80−52=28 units. 
Efficiency of Z = 7−5=2 units/day.
With how many states does the boundary of Haryana touch?
In case of any dispute, an adulterated sample need to be examined by the court. The Central Food Laboratories give its final opinion on the subject, und...
Which of the following nutrient deficiency causes buttoning in cauliflower?
Which of the following is not the common pest of Rice crop?
Aflatoxin, a mycotoxin produced by Aspergillus, is associated with ____ crop.
A set of interrelated units that are engaged in joint problem solving to accomplish a common goal.
Blue green algae can add up to what quantity of Nitrogen per hectare to a rice field?
FPO stands for food process order and it is a certification mark for the processed food industry to ensure proper hygiene and sanitation is maintained ...
Which of the following soil order is mainly found in grassland ecosystems characterized by a thick, dark surface horizon?
Which fish can be easily grown in brackish water with quick growth rate and can tolerate the fluctuations in temperature?
