P and Q completed a work together and were paid Rs 1080 and Rs 1440, respectively. If P can do the entire work in 20 days, how many days did they take to complete the work together?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 8
Given:
Earning of P = Rs. 1080
earning of Q = Rs. 1440
Time taken by P = 20 days
Concept Used:
Total work = Efficiency × Time
The earnings are distributed in the ratio of respective efficiencies.
Explanation:
Ratio of amount paid to Pand Q = 1080/1440 = 3 : 4
Now, total work = 20 × 3 = 60 units
So, time taken by both of them to complete the work = 60/7 = days.