. . .
Q2. Pipe P alone can fill a tank in 36 hours and can fill 75% of the tank in 15 hours along with Q. Pipe R can fill whole the tank along with Q in 18 hours. Find the time taken by pipe P, Q and R to fill 2/3 of the tank together?
(a) 12 hrs
(b) 16 hrs
(c) 20 hrs
(d) 24 hrs
(e) 8 hrs
Q5. Ratio of time taken to cover (A +5) km in downstream to that of time taken to cover (A – 7) km in upstream is 5:12. If ratio of speed of boat in upstream to that of stream is 2 : 3 and difference of time taken by the boat to travel (A-1) km in upstream to that in downstream is 6 hr then find the speed of boat in still water?
(a) 4.5 km/hr
(b) 5.5 km/hr
(c) 7.5 km/hr
(d) 4 km/hr
(e) 6 km/hr
Solutions