Question
If all five workers start working together, how many
days will they take to complete the entire 500 units of work? Direction: Five workers – A, B, C, D, and E – are working on a construction project to complete 500 units of work. Each worker works different numbers of hours per day and has varying work efficiencies, which are calculated as the number of units completed per hour. The following table shows the daily working hours and the efficiency (units per hour) for each worker:Solution
Total work done by A in 1 day = 8 × 2 = 16 units. Total work done by B in 1 day = 6 × 3 = 18 units. Total work done by C in 1 day = 5 × 4 = 20 units. Total work done by D in 1 day = 7 × 2.5 = 17.5 units. Total work done by E in 1 day = 9 × 1.8 = 16.2 units. Total units per day by all workers = 16 + 18 + 20 + 17.5 + 16.2 = 87.7 units/day. Days required = 500 ÷ 87.7 ≈ 5.7 days.
The population of a town increases by 10% in the first year and by 20% in the second year. If the population at the end of the second year is 39,600, fi...
A company manufactures two products, A and B, with production costs of 150 and 200, respectively. To meet market demand, the company raises the price of...
Out of a total of 120 students in a class, 50% are boys and the rest are girls. Out of the total number of students who appeared in the class test, 35% ...
In a job fair, 50% of the people are graduates, one fifth of them are post graduates and rest are double graduates. If three-fourth of the graduates, 60...
A sum of Rs. 55,200 was divided between 'A' and 'B' such that the amount received by 'B' was 30% more than that by 'A'. If 'A' and 'B' spent 10% and 25...
If 35% of 40% of 7/5 of a number is 490, then what is 25% of 2/3 of that number?
A and B have monthly incomes in the ratio of 6:5, respectively. Both save the same amount each month. A's monthly expenses are five times B's monthly sa...
- In a school election, two students contested for the position of head boy. The winner got 60% of the votes and won by 800 votes. Calculate the number of vo...
Neha goes to a bookstore with a certain amount of money. She can buy 60 notebooks or 20 novels with the money she has. However, she saves 15% of the amo...
Rajesh spent 30% and 24% of his monthly salary on food and rent, respectively. Of the remaining amount, he gave 20% and 25% to his mother and brother, r...
Relevant for Exams:
