IBPS Clerk Prelims Model Paper 14

As per question, ratio of efficiency of P and Q i.e. 3 : 1
So, total efficiency of
(P + Q) = 4
Then, ratio of time taken by P and Q is 1 : 3
Let time taken by P is X days
So time taken by Q is 3X days
Time taken by P = time taken by
Q – 60 days
X = 3X – 60
2X = 60
X = 30 days
Eff.P+Q×TP+Q
= Eff.P×TP
4XTP+Q = 3 × 30
TP+Q = 90 days
TP+Q = (90/4) days
TP+Q = 22(1/2) days