Question
14 women working 8 hours a day
can complete a piece of work in 30 days. What is the time taken by 28 men working 5 hours a day to complete the work if the efficiency of a woman is 30% less than that of a man?Solution
ATQ,
Let the efficiency of a man be '5a' units/day. So, the efficiency of a woman = 0.70 × 5 = '3.5a' units/day. Total work = 14 × 3.5a × 8 × 30 = '11760a' units. So, time taken by 28 men working 5 hours a day to complete the work: = 11760a ÷ (28 × 5a × 5) = 16.8 days.
In a ‘10Y’ litres of mixture of milk and water, the quantity of milk is 60%. According to which of the following statements the value of ‘Y’ wi...
A 400 ml mixture consists of 30% alcohol. Find how much alcohol must be added so that alcohol makes up 50% of the new mixture.
Mixture ‘A’ contains 80% acetone and rest 30 litres water. Mixture ‘B’ contains 72 litres acetone and rest 50% water. When two m...
In a mixture, the quantity of salt is 40% of the quantity of water. On removing 90 litres mixture and adding 20 litres each of salt and water, the quant...
In a mixture of milk & water, 70 litres water is mixed due to which ratio changes from 3 : 4 to 1 : 3. Find initial quantity of mixture. (in litres)
A juice mixture contains 180 liters of liquid, where the amount of juice is 40% more than the amount of water. If 20 liters of juice is added, what will...
- A drum is filled with 840 litres of syrup and water in the ratio 2:5. If ‘k’% of the total solution is withdrawn and the water taken out is 210 litres,...
Quantity of milk is 10% more than that of water in 210 litres mixture. On adding (n - 5) litres water and (n + 5) litres milk, the new ratio becomes 11:...
A mixture contains 90% milk and rest water. A man withdrew some mixture and replaced it with same quantity of kerosene, such that the quantity of milk r...
400 litres of mixture X contains acetone and glycerine in the ratio 11:14, respectively. 100 litres of the mixture is withdrawn and labelled as mixture ...
Relevant for Exams:
