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- Shush and Komal can do a job together in 7 days.
Question 1:
Shush and Komal can do a job together in 7 days. Shush is 7/4 times as efficient as Komal. The same job can be done by Shush alone in A. 49/4 days
B. 49/3 days
C. 1 days
Feedback Ratio of efficiency of Shush and Komal = 7/4:1 = 7:4
As the time taken is inversely proportional to efficiency, therefore, if Komal takes 7x days to complete work, Shush will take 4x days.
Therefore 1/7x + 1/4x = 1/7 => (4+7)/28x = 1/7
=> 28x = 11 × 7
Therefore x = {(11×7)/28} = 11/4
Shush will complete the work in 4x = 4 (11/4) = 11 days.
As the time taken is inversely proportional to efficiency, therefore, if Komal takes 7x days to complete work, Shush will take 4x days.
Therefore 1/7x + 1/4x = 1/7 => (4+7)/28x = 1/7
=> 28x = 11 × 7
Therefore x = {(11×7)/28} = 11/4
Shush will complete the work in 4x = 4 (11/4) = 11 days.
D. 28/3 days
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