Question

X , y ,z can finish a piece of work in 20 , 30 , and 40 days respectively . If X left the work after working for 5 days . In how many days Y and Z together can finish the remaining work?

Answer 1

Answer:

7.14

Step-by-step explanation:

LCM of 20, 30 & 40 = 120

Calculate one day's work done by X, Y & Z

Then, calculate 5 days work done by X, Y & Z

X leaves after 5 days, so the rest work will be done by Y and Z

Time taken by Y and Z = work left ÷ time taken by Y & Z

i.e, 7.14 days