Question

x,y and z can do a piece of work in 12,15 and 20 days.they started the work together,but z left after 2 days.in how many days will the remaining work the complete by x and y.

Answer 1

in one day x can do 1/12 work,y can do1/15 work,z can do 1/20 work they together 1/12+1/15+1/20.x-2/20 =1 solve this equation you will get answer.i hope you will mark as brainliest answer

Answer 2

Work done by x y z in 1 day=1/12 ,1/15,1/20 respectively
Work completed by them together in 2 days =2(1/12+1/15+1/20)
=2/5