RRB Paramedical Staff Nurse Model Paper 4

Given, part of tank filled by A = 45 min
And emptied by B= 1 h or 60 min
Then, part of the tank filled in first 2 min
=‌

1

45

−‌

1

60

=‌

4−3

180

=‌

1

180

since, ‌

1

180

part is filled in 2 min.
Thus, 1−‌

1

45

=‌

44

45

part is filled in
‌

2×180×44

45

=352min
i.e., 5 h 52 min
Remaining part will be filled in 1 min.
Thus total time taken = 5 h 53 min