Question

m/contest/quiz raghu_pre_assessment_test/60615/33552455295169145
O days 1 hr
15
Reasoning Ability raghu 15
Verbal Ability raghu 16
Q- 11.
Question Type: Multiple Choice Question
A can do a piece of work in 10 days, and B can do the same work in 20 days. With the help of C, they
finished the work in 4 days. C can do the work in how many days, working alone?​

Answer 1

Answer:

10 days

Step-by-step explanation:

Amount of work A can do in 1 day = 1/10

Amount of work B can do in 1 day = 1/20

Amount of work C can do in 1 day = 1/x [Let's Say]

Then, 1/10 + 1/20 + 1/x = 1/4

2/20 + 1/20 + 1/x = 5/20

3/20 + 1/x = 5/20

1/x = 2/20 = 1/10

x = 10

So, C can complete the work in 10 days alone.