Vivek can do a certain work in 14 days. Vishal is 75% more effici
| Vivek can do a certain work in 14 days. Vishal is 75% more efficient than Vivek. How many days will Vishal alone take to do the same work?
A. 8 days
B. 9 days
C. 10 days
D. 6 days
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
Now Vishal is 75% more efficient than Vivek.
Ratio of efficiency = 4 : 7
We know the ratio of efficiency is inversely proportional to time
Ratio of time = 
Now Vivek can do work in 14 days.
So 
Hence x = 8 days
Then Vishal can do the same work in 8 days.
