RRB Non Technical Model Papers 8 with solutions

Question : 54 of 100

Marks: +1, -0

A tank can be filled by taps A and B in 8 hr and 10 hr, respectively. Tap C can empty it in 16 hr. If all taps are working together, how many hours are needed to fill the tank?

$60 /13 hr$
$50 /17 hr$
$80 /13 hr$
$40 /13 hr$

Validate

Solution:

(3) In 1 hr, The tap A can fill

1/8

of
the tank The tap B can fill

1/10

of
the tank The tap C can empty

1/16

of the tank Together they can fill

1 /8+1 /10- 1/16= 13/ 80

of the tank
∴ Required time to fill the tank

= 80/13 hr

Go to Question:

Prev Question

Next Question