Time and Work Practice Test 2 with solutions

Work done by Sohan in one day = $\frac{1}{32}$
Work done by Sohan in 8 days = $8\times \frac{1}{32}$ = $\frac{1}{4}$
Remaining work = $1-\frac{1}{4}$ = $\frac{3}{4}$
Work done by Sohan and Sukhbir together in one day
= $\frac{1}{32}+\frac{1}{28}$ = $\frac{15}{224}$
So, Sohan and Sukhbir finish work in $\frac{224}{15}$ days.
Sohan and Sukhbir finish $\frac{3}{4}$ th part of the work in $\left(\frac{224}{15}\times \frac{3}{4}\right)$ days
= $11\frac{1}{5}$ days.