RRB NTPC SAMPLE PAPER - ARITHMETIC - 220

RRB NTPC SAMPLE PAPER - ARITHMETIC - 220

1. A pipe of diameter d can drain a certain water tank in 40 minutes. The time taken by a pipe of diameter 2d for doing the same job is

(a) 5 minutes
(b) 10 minutes
(c) 20 minutes
(d) 80 minutes

2. A contractor undertakes to make a road in 40 days and employs 25 men. After 24 days, he finds that only one­third of the road is made. How many extra men should he employ so that he is able
to complete the work 4 days earlier?

(a) 100
(b) 60
(c) 75
(d) None of these

3. A can do a work in 15 days and B in 20 days.If they together work on it for 4 days, then the fraction of the work that is left is

(a) 8/15
(b) 7/15
(c) 1/4
(d) 1/10

4. A tap can empty a tank in one hour. A second tap can empty it in 30 minutes. If both the taps operate simultaneously, how much time is needed to empty the tank?

(a) 20 minutes
(b) 30 minutes
(c) 40 minutes
(d) 45 minutes

5. The perimeter of the top of a rectangular table is 28m., whereas its area is 48m². What is the length of its diagonal?

(a) 5m.
(b) 10 m.
(c) 12m.
(d) 12.5 m.

Railway Recruitment Board (RRB) NTPC Exams Study Kit

Answer:

1. (b) 2. (c) 3. (b) 4. (a) 5. (b)