alleryPipe A fills a tank in 8 hours; Pipe B fills it in 12 hours. How long do both pipes take together?
A$10$ hours
B$6$ hours
C$4.8$ hours
D$5$ hours
Answer & Solution
Correct answer: C. $4.8$ hours
Rate of A = 1/8 tank/hour.
Rate of B = 1/12 tank/hour.
Together = 1/8 + 1/12 = 3/24 + 2/24 = 5/24 per hour.
Time = 24/5 = 4.8 hours.
Keep practising Time, Speed and Distance
Browse all Time, Speed and Distance questions for CAT, or explore more Quantitative Reasoning topics.
Related questions
A man covers a distance in 6 hours at 40 km per hour. To cover it in 4 hours he must traveA man travels equal distances at 40 km per hour and at 60 km per hour. His average speed iA train 200 m long crosses a 100 m platform at 36 km per hour. It takes:A train 150 m long runs at 54 km per hour. The time it takes to pass a pole is:A car covers 300 km at 50 km per hour. At 75 km per hour the same trip would take:Zaheeda doubles her speed on the same route. The time she takes:A journey takes 120 km at a steady 60 km per hour. The time taken is:For a fixed distance, if the speed is increased then the time taken: