P and Q completed a work together and were paid ₹1,080 and ₹1,440, respectively. If P can do the entire work in 20 days, how many days did they take to complete the work together?
Answer & explanation
Correct answer: option 4
Calculations,
P : Q
1080 : 1440
Efficiency 9 : 12
3 : 4
⇒ As given, Q can complete the total work in 20 days,
Therefore, 3 x 20 = 60 units ..(Efficiency × Days = Total work)
⇒ Time taken to complete the work together = \(\frac{60}{3 + 4}\) = \(\frac{60}{7}\) = \( { 8}_{ 7}^{4 } \) days.