IBM Company Numerical Ability Time and Work

A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With the help of C, they did the job in 4 days only. Then, C alone can do the job in
A. 9x1/5 days B. 9x2/5 days
C. 9x3/5 days D. 10 days

Read Solution (Total 3)

Ans is C)9 3/5 days

1/16 + 1/12 + 1/C = 1/4

1/C = 1/4 -1/16 -1/12 = 5/48

Therefore C = 9 3/5 days
12 years agoHelpfull: Yes(8) No(1)

C.
ABC/(AB+BC+CA)=4
16*12*C/(16*12+12C+16C)=4
C=48/5=9*3/5
7 years agoHelpfull: Yes(1) No(0)
C
1/16+1/12+1/C=1/4
9 years agoHelpfull: Yes(0) No(1)

IBM Other Question

A,B, and C can complete a piece of work in 24,6 and 12 days respectively. Working together , they will complete the same work in
A. 1/24 day B. 7/24 day
C. 3x3/7 days D. 4 days Worker A takes 8 hours to do a job. Worker B takes 10 hours to do the same job. How long should it take both A and B, working together but independently to do the same job?