Q1. 
$A$ can do piece of work in 30 days while $B$ alone can do it in 40 days. In how many days can $A$ and $B$ working together do it? 
A.  \(16\dfrac{1}{7}\) 

B.  \(17\dfrac{1}{7}\) 

C.  \(18\dfrac{1}{7}\) 

D.  \(19\dfrac{1}{7}\) 
Q2. 
To complete a piece of work $A$ and $B$ take 8 days, $B$ and $C$ 12 days. $A$, $B$ and $C$ take 6 days. $A$ and $C$ will take : 
A.  7 Days 

B.  7.5 Days 

C.  8 Days 

D.  8.5 Days 
Q3. 
Two pipes can fill the cistern in 10hr and 12 hr respectively, while the third empty it in 20hr. If all pipes are opened simultaneously, then the cistern will be filled in 
A.  7.5 hr 

B.  8 hr 

C.  8.5 hr 

D.  10 hr 
Q4. 
Mr. Ram is on tour and he has Rs 360 for his expenses. If he exceeds his tour by 4 days he must cut down daily expenses by Rs 3. The number of days of Mr. Ram's tour programme is 
A.  28 Days 

B.  24 Days 

C.  22 Days 

D.  20 Days 