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Maths MCQ Questions With Answers PDF Download
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Maths MCQ Questions With Answers
Question 1.
If a solid metallic sphere of radius 8 cm is melted and recasted into n spherical solid balls of radius 1 cm, then n =
(a) 500
(b) 510
(c) 512
(d) 516
Answer
Answer: (c) 512
Question 2.
The radii of the top and bottom of a bucket of slant height 13 cm are 9 cm and 4 cm respectively. The height of the bucket is
(a) 10 cm
(b) 12 cm
(c) 15 cm
(d) 16 cm
Answer
Answer: (b) 12 cm
Question 3.
If the volume of a cube is 343 cm , then its edge is
(a) 9cm
(b) 8cm
(c) 49cm
(d) 7cm
Answer
Answer: (d) 7cm
Question 4.
A solid piece of iron in the form of a cuboid of dimensions 49 cm × 33 cm × 24 cm, is moulded to form a solid sphere. The radius of the sphere is
(a) 21 cm
(b) 23 cm
(c) 25 cm
(d) 19 cm
Answer: (a) 21 cm
Question 5.
A conical tent with base-radius 7 m and height 24 m is made from 5 m wide canvas. The length of the canvas used is (Take π = 227)
(a) 100 m
(b) 105 m
(c) 110 m
(d) 115 m
Answer
Answer: (c) 110 m
Question 6.
The radius (in cm) of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is:
(a) 4.2
(b) 2.1
(c) 8.1
(d) 1.05
Answer
Answer: (b) 2.1
Question 7.
If the curved surface area of a solid right circular cylinder of height h and radius r is one-third of its total surface area, then
(a) h = 13 r
(b) h = 12 r
(c) h = r
(d) h = 2r
Answer
Answer: (b) h = 12 r
Question 8.
A surahi is the combination of:
(a) a sphere and a cylinder
(b) a hemisphere and a cylinder
(c) two hemispheres
(d) a cylinder and a cone
Answer
Answer: (a) a sphere and a cylinder
Question 9.
A right circular cylinder of radius r cm and height h cm (h > 2r) just encloses a sphere of diameter
(a) r cm
(b) 2r cm
(c) h cm
(d) 2h cm
Answer
Answer: (b) 2r cm
Question 10.
The total surface area of a hemispherical solid having radius 7 cm is
(a) 462 cm2
(b) 294 cm2
(c) 588 cm2
(d) 154 cm2
Answer
Answer: (a) 462 cm2
Question 11.
The volume of the cuboid whose length, breadth and height is 12cm, 8cm and 6cm is
(a) 568 cu.cm
(b) 576 cu.cm
(c) 576 sq.cm
(d) 570 cu.cm
Answer
Answer: (b) 576 cu.cm
Question 12.
A shuttlecock used for playing badminton has the shape of the combination of
(a) a cylinder and a sphere
(b) a sphere and a cone
(c) a cylinder and a hemisphere
(d) frustum of a cone and a hemisphere
Answer
Answer: (d) frustum of a cone and a hemisphere
Question 13.
If the diameter of a metallic sphere is 6 cm, it is melted and a wire of diameter 0·2 cm is drawn, then the length of the wire made shall be
(a) 24 m
(b) 28 m
(c) 32 m
(d) 36 m
Answer
Answer: (d) 36 m
Question 14.
The radius and height of a right circular cone and that of a right circular cylinder are respectively equal. If the volume of the cylinder is 300 cu.cm, then the volume of the cone is
(a) 300 cu.cm
(b) 100 cu.cm
(c) 600 cu.cm
(d) 900 cu.cm
Answer
Answer: (b) 100 cu.cm
Question 15.
A cube whose edge is 20 cm long, has circles on each of its faces painted black. What is the total area of the unpainted surface of the cube if the circles are of the largest possible areas?
(a) 90.72 cm2
(b) 256.72 cm2
(c) 330.3 cm2
(d) 514.28 cm2
Answer
Answer: (d) 514.28 cm2
Question 16.
The volumes of two spheres are in the ratio 125 : 64. The ratio of their surface areas is
(a) 9 : 16
(b) 16 : 9
(c) 25 : 16
(d) 16 : 25
Answer
Answer: (c) 25 : 16
Question 17.
A container (open at the top) made up of metal sheet is in the form of a frustum of a cone of height 16 cm with radii of its lower and upper ends 8cm and 20 cm respectively. The amount of liquid the container can hold is (Take π = 3.14)
(a) 104.49 |
(b) 10.95 |
(c) 12 |
(d) 10.45 |
Answer
Answer: (d) 10.45 |
Question 18.
A mason constructs a wall of dimensions 270 cm × 300 cm × 350 cm with the bricks each of size 22.5 cm × 11.25 cm × 8.75 cm and it is assumed that 1/8 space is covered by the mortar.
Then the number of bricks used to construct the wall is
(a) 11100 cm
(b) 11200 cm
(c) 11000 cm
(d) 11300 cm
Answer
Answer: (b) 11200 cm
Question 19.
If two solid hemispheres of same base radius are joined together along their bases, then curved surface area of this new solid is
(a) 3πr2
(b) 4πr2
(c) 5πr2
(d) 6πr2
Answer
Answer: (b) 4πr2
Question 20.
If the radius and height of a cylinder are in the ratio 5 : 7 and its volume is 550 cm3, then its radius is equal to (Take π = 227)
(a) 5 cm
(b) 7 cm
(c) 6 cm
(d) 10 cm
Answer
Answer: (a) 5 cm
Question 21.
The curved surface area of glass having radii 3 cm and 4 cm respectively and slant height 10 cm is
(a) 55 cm2
(b) 110 cm2
(c) 220 cm2
(d) 440 cm2
Answer
Answer: (c) 220 cm2
Question 22.
A piece of paper is in the shape of a semi¬circular region of radius 10 cm. It is rolled to form a right circular cone. The slant height is
(a) 5 cm
(b) 10 cm
(c) 15 cm
(d) 20 cm
Answer
Answer: (b) 10 cm
Question 23.
The base area of the cylinder is 80 sq.cm. If its height is 5cm, then its volume is
(a) 200 cu.cm
(b) 80 cu.cm
(c) 100 cu.cm
(d) 400 cu.cm
Answer
Answer: (d) 400 cu.cm
Question 24.
The cost of painting a cubical box of side 3m at the rate of Rs.2 per sq.m is
(a) Rs.108
(b) Rs.120
(c) Rs.125
(d) Rs.112
Answer
Answer: (a) Rs.108
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