Question

p does the job in 11 days while q takes 12 days and r takes 22 days for the same job.p and q started working together.but, after two days they left and r had to complete the job.find the number of days required to complete the job​

Answer 1

Step-by-step explanation:

P 11

q 12

r 22

total work 132

efficiency of P+q = 23

2 day work 23×2= 46

now left p& q and now r join it means 132-46 = 86 work left

efficiency of r= 6

86/6= 14⅓