RRB NTPC SAMPLE PAPER - ARITHMETIC - 88

1. If the volumes of two cubes are in the ratio 27: 1, the ratio of their edges is

(a) 3 : 1
(b) 27 : 1
(c) 1 :3
(d) 1 : 27

2. The sides of a rectangular plot are in the ratio 5:4 and its area is equal to 500 sq.m. The perimeter of the plot is

(a) 80m.
(b) 100m.
(c) 90m.
(d) 95m.

3. The radius of a wheel is 21 cm. How many revolution will it make in travelling 924 metres?

(use π = 22/7)

(a) 7
(b) 11
(c) 200
(d) 700

4. The edges of a cuboid are in the ratio 1 : 2 : 3 and its surface area is 88cm². The volume of the cuboid is:

(a) 120 cm³
(b) 64 cm³
(c) ,48 cm³
(d) 24 cm³

5. The area of a sector of a circle of radius 5 cm, formed by an arc of length 3.5 cm is

(a) 8.5 cm²
(b) 8.75 cm²
(c) 7.75 cm²
(d) 7.50 cm²

Railway Recruitment Board (RRB) NTPC Exams Study Kit

Answer:

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