60.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:
A. 9 ⅕ days
B. 9 ⅖ days
C. 9 ⅗ days
D. 10 days
Answer:
Option : C
(A + B + C)'s 1 day's work =
|
1
|
4
|
C's 1 day's work =
|
1
|
-
|
|
1
|
+
|
1
|
|
=
|
|
1
|
-
|
1
|
|
=
|
5
|
4
|
16
|
12
|
4
|
48
|
48
|
So, C alone can do the work in
|
48
|
= 9
|
3
|
days.
|
5
|
5
|
