Question : $\frac{6}{7}$ part of a tank is filled with oil. After taking out 60 litres of oil, the tank is $\frac{4}{5}$ part full. What is the capacity (in litres) of the tank?

Option 1: 350

Option 2: 700

Option 3: 360

Option 4: 1050

Question : Pipe A can fill a tank of capacity 350 litres in $3 \frac{1}{2}$ minutes. Pipe B can fill a tank of capacity 780 litres in $8 \frac{2}{3}$ minutes. How long (in min) will it take to fill a tank of capacity 1615 litres, if both pipes are opened together?

Option 1: $9$

Option 2: $7 \frac{1}{2}$

Option 3: $8 \frac{1}{2}$

Option 4: $8$

Question : Pipes A and B can fill an empty tank in 6 and 8 hours respectively, while pipe C can empty the full tank in 10 hours. If all three pipes are opened together, then the tank will get filled in:

Option 1: $4 \frac{4}{23}$ hours

Option 2: $6\frac{1}{5}$ hours

Option 3: $5\frac{5}{23}$ hours

Option 4: $7\frac{1}{2}$ hours

Question : Pipes A and B can fill a tank in 18 minutes and $22 \frac{1}{2}$ minutes, respectively while pipe C can empty the full tank in 12 minutes. A and B are opened together for 6 minutes and then closed. Now C is opened. C alone will empty the tank in ____.

Option 1: $5$ minutes

Option 2: $8 \frac{2}{5}$ minutes

Option 3: $7 \frac{1}{5}$ minutes

Option 4: $6$ minutes

Question : The value of $6 \frac{8}{15}÷\frac{7}{9}$ of $\left(1 \frac{1}{10}+5 \frac{1}{5}\right)+\frac{2}{5}÷7 \frac{1}{5}$ is:

Option 1: $\frac{25}{16}$

Option 2: $\frac{5}{14}$

Option 3: $\frac{25}{18}$

Option 4: $\frac{5}{18}$

Question : The greatest fraction among $\frac{2}{3}, \frac{5}{6}, \frac{11}{15} \text{ and } \frac{7}{8} \text{ is:}$

Option 1: $\frac{7}{8}$

Option 2: $\frac{11}{15}$

Option 3: $\frac{5}{6}$

Option 4: $\frac{2}{3}$