A can complete a piece of work in days, and B can complete the same work in days. If they work together, in how many days will they finish the entire work?
Answer and explanation
Correct answer: C.
- Step 1: Work rate of A is per day, and work rate of B is per day.
- Step 2: Combined work rate is per day.
- Step 3: Total time taken together is .
Answer
.
Why not the others: halves A's individual time; is the average of and . does not fit.
Practise more Quantitative aptitude and arithmetic.
Free questions with an explanation for every one, and full timed CUET UG mock tests.
More Quantitative aptitude and arithmetic questions
- If the price of sugar increases by , by what percentage must a household reduce its consumption so that the expenditure on sugar remai…
- A shopkeeper sells an article for at a loss of . At what price should he sell it to gain a profit of ?
- What is the compound interest on a principal of for years at per annum compounded annually?
- The ratio of boys to girls in a college of students is . How many more girls must be admitted to make the ratio ?
- A train running at a uniform speed of crosses a stationary pole in . What is the length of the train?
- The average score of 5 consecutive odd numbers is 27. What is the value of the largest of these odd numbers?