Question (25/50)
X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and after 4 days Y joined him till the completion of the work. Total how many days did work last ?(A) 6 Days
(B) 10 Days
(C) 13 Days
(D) 15 Days
Question (26/50)
A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all started working together, but B and C leaves after 10 days. How many days more will A take to finish the remaining work ?(A) 18 Days
(B) 24 Days
(C) 30 Days
(D) 36 Days