Railway Rrb Exam Template With Answers Page 12
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42Railway RRB : Model paper 1
43. 45 men can complete a work in 16 days. Six days after they started working.
30 more men joined them. How many days will they now take to complete
the remaining work?
a) 18 days
b) 12 days
c) 9 days
d) 6 days
e) None of these
44. Two pipes A and B can fill a cistern in 15 hours and 10 hours respectively.
A tap C can empty the full cistern in 30 hours. All the three taps were open
for 2 hours, when it was remembered that the emptying tap had been left
open. It was then closed. How many hours more would it take for the cistern
to be filled?
a) 30 min.
b) 1.2 hours
c) 24 min.
d) 35 min.
e) None of these
45. A tyre has two punctures. The first puncture alone would have made the
tyre flat in 9 minutes and the second alone would have done it in 6 minutes.
If air leaks out at a constant rate, how long does it take both the punctures
together to make it flat?
a) 1
b) 3
c) 3
d) 4
e) None of these
Page 11
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