RRB Assistant Loco Pilot and Technician Model Paper 1 with solutions

Question : 20 of 100

Marks: +1, -0

Pipe A alone can fill a tank in 8 hours. Pipe B alone can fill it in 6 hours. If both the pipes are opened and after 2 hours pipe A is closed, then the other pipe will fill the tank in

6 hours
$3 1/2$ hours
4 hours
$2 1/2$ hours

Validate

Solution:

(d) Part of the tank filled by both pipes in two hours
2

(1/8+1/6)

= 2

({3+4}/24)=7/12

Remaining part = 1 -

7/12=5/12

Time taken by B in filling the remaining part
=

5/2

x 6 =

5/2

2 1/2

hours

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