RRB NTPC SAMPLE PAPER - ARITHMETIC - 92

1. Find the length of the largest rod that can be placed in a room 16m long, 12m broad and 32/3m. high.

(a) 23 m.
(b) 68 m.
(c) 68/3 m.
(d) 67/3 m.

2. A solid metallic cone of height 10 cm, radius of base 20 cm is melted to make spherical balls each of 4 cm. diameter. How many such balls can be made ?

(a) 25
(b) 75
(c) 50
(d) 125

3. The height of a conical tank is 60 cm and the diameter of its base is 64cm. The cost of painting it from outside at the rate of Rs. 35 per sq. m. is

(a) Rs. 52.00 approx.
(b) Rs. 39.20 approx.
(c) Rs. 35.20 approx.
(d) Rs. 23.94 approx.

4. A cylindrical tank of diameter 35 cm is full of water. If 11 litres of water is drawn off, the water level in the tank will drop by :

(use π = 22/7)

(a) 21/2 cm
(b) 90/7 cm
(c) 14 cm.
(d) 80/7 cm

5. A and B can do a piece of work in 72 days. B and C can do it in 120 days, A and C can do it in 90 days. In how many days all the three together can do the work ?

(a) 80 days
(b) 100 days
(c) 60 days
(d) 150 days

Railway Recruitment Board (RRB) NTPC Exams Study Kit

Answer:

1. (c) 2. (d) 3. (d) 4. (d) 5. (c)