Pipes P and Q can fill a tank in 10 and 12 hours respectively and C can empty it in 6 hours. If all the three are opened at 7 a.m., at what time will one-fourth of the tank be filled
1). 10 a.m
2). 10 p.m
3). 11 p.m
4). 11 a.m
A tap can fill an empty tank in 12 hours and another tap can empty half the tank in 10 hours. It both the taps are opened simultaneously, how long would it take for the empty tank to be filled to half its capacity
1). 30 hours
2). 20 hours
3). 15 hours
4). 12 hours
$\frac{3}{4}$ part of a tank is full of water. When 30 litres of water is taken out, the tank becomes empty.The capacity of the tank is
1). 36 litres
2). 42 litres
3). 40 litres
4). 38 litres
A cistern has two pipes. One can fill it with water in 8 hours and other can empty it in 5 hours, in how many hours will the cistern be emptied If both the pipes are opened together when 3/4 of the cistern in already full of water
1). $13\frac{1}{3}$ hours
2). 10 hours
3). 6 hours
4). $3\frac{1}{3}$ hours
If $\frac{1}{3}$ of a tank holds 80 litres 0f water, then the quantity of water that $\frac{1}{2}$ tank holds is :
1). 240 litres
2). 120 litres
3). $\frac{80}{3}$ litres
4). 100 litres