RRB NTPC SAMPLE PAPER - ARITHMETIC - 44

1. The area of a circle is 38.5 sq. cm. Its circumference (in cm) is (use π = 22/7):

(a) 22
(b) 24
(c) 26
(d) 32

2. The breadth of a rectangular hall is three-fourths of its length. If the area of the floor is 768 sq. m. then the difference between the length and breadth of the hall is

(a) 8 metres
(b) 12 metres
(c) 24 metres
(d) 32 metres

3. A metallic hemisphere is melted and recast in the shape of a cone with the same base radius (R) as that of the hemisphere. If H is the height of the cone, then

(a) H = 2R
(b) H = 2/3 R
(c) H = √3R
(d) B = 3R

4. A conical vessle whose internal radius is 12 cm and height 50 cm is full of liquid. The contents are emptied into a cylindrical vessel with radius (internal) 10 cm. The height to which the liquid rises in the cylindrical vessel is

(a) 25cm
(b) 20cm
(c) 24cm
(d) 22cm

5. Two right circular cylinders of equal volume have their heights in the ratio 1 : 2. The ratio of their radii is

(a) √2:1
(b) 2 : 1
(c) 1 : 2
(d) 1 : 4

Railway Recruitment Board (RRB) NTPC Exams Study Kit

Answer:

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