Question : A is 50% more efficient than B. B finished the same work in 20 days. If A and B worked together, then how much time would they take to finish the same work?
Option 1: 10 days
Option 2: 7 days
Option 3: 8 days
Option 4: 9 days
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 8 days
Solution : Let the efficiency of B be 100. So, the efficiency of A = 100 + 50 =150 The efficiency ratio of A and B = 150 : 100 = 3 : 2 Total efficiency = 3 + 2 = 5 units The time taken by B to finish the work is 20 days. So, Total work = Efficiency of B × Time taken by B ⇒ Total work = 2 × 20 = 40 units Time taken by (A + B) to complete the work = $\frac{\text{Total work}}{\text{Total efficiency}}$ = $\frac{40}{5}$ = $8$ days A and B together will finish the work in 8 days. Hence, the correct answer is 8 days.
Candidates can download this ebook to know all about SSC CGL.
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Question : A can finish a work in 20 days and B can complete the same work in 15 days. B worked for 9 days and left the job. In how many days can A alone finish the remaining work?
Question : A is 40% more efficient than B. How much time will both, working together, take to finish the work, which B alone can finish in 36 days?
Question : P, Q, and R can complete a piece of work in 10 days, 15 days, and 20 days, respectively. If they work together, in how many days can they finish the same work?
Question : A and B together can finish a work in 30 days. They worked on it for 20 days and then B left. The remaining work was done by A alone in 20 days. In how many days can A alone finish the work?
Question : 2 men can finish a work in 6 days and 3 women can finish the same work in 4 days. How many days will 1 man and 2 women finish the work if they work together daily?
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile