B) 10
C) 25
D) 30
A takes 1 day to complete 1/20.
Therefore let the number of days taken to complete the whole work be x.
Therefore:
1: 1/20 :: x :20/20 ( Product of means =product of extremes)
x/20= 20/20
x=20/20*20
x=20 days
Therefore the answer = 20 days
Related MCQs:
- A is twice as good as workman as B and together they finish a piece of work in 18 days. In how many days will B alone finish the work?
- Asghar can do a job in 60 days and both Asghar and Babar can do the same job in 20 days working together. Babar alone can do the same job in:
- A group of 10 students working one hour day complete a job in 12 days. In how rm days will 12 students in group working (hour per day finish the same job?
- A person can do the work in 10 days but another finishes the same work in 15 days, Together they can finish in how many days?