A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in how many days ?
C alone can do the job in 48/5 = 9.6 days! Let's say C can do the work alone in X days then; 1 day of work combined = 1/16+1/12+1/X = 1/4 by solving, we get 3X+4X+48 = 12X >> 5X=48 >> X=48/5 = 9.6 days.
A lays 1/16 distance per day; B lays 1/12 distance per day. With C, they lay 1/4 distance per day. So: 1/16 +1/12 + 1/C=1/4 3C+4C+48=12C 5C=48 C=48/5 days that it would take for C to do the job alone ☺☺☺☺
X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last?
Dhoni can do a piece of work in 80 days. He works at it for 10 days and then Virat alone finishes the work in 42 days. How many number of days would be taken by the two together to finish the work.
Vinay can do a certain work in 16 days. Shubham is 60% more efficient than Vinay. How many days does Shubham alone take to do the same work?
A alone can complete a piece of work in 30 days. B is 50% more efficient than A. With the help of C, together they completes the work in 6 days, then C is ____ efficient than ______. Fill in the blanks.
