Tap A and B can fill a tank in 10 hr and 15 hr respectively Tap A can fill the tank up to 2 3 of it ...........

Quantitative Aptitude (CDS) Pipes&cistern

Tap A and B can fill a tank in 10 hr and 15 hr respectively. Tap A can fill the tank up to 2/3 of it and the remaining tank is filled by B.Find the total time to fill the tank?

20 hr

35 hr

35/3 hr

30 hr

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Explanation:

Tap A filled tank in 10 hours
Tap B fill tank in 15 hours
To fill 2/3 tank A take t time
t/10 =2/3
t=20/3 hours
Tap B fill 1/3 level T1 time
T1/15 =1/3
T1 =5 hours
Total time =20/3 + 5
=35/3