# MCQ Questions for Class 9 Maths Chapter 13 Surface Areas and Volumes with Answers

Students are advised to solve the Surface Areas and Volumes Multiple Choice Questions of Class 9 Maths to know different concepts. Practicing the MCQ Questions on Surface Areas and Volumes Class 9 with answers will boost your confidence thereby helping you score well in the exam.

Explore numerous MCQ Questions of Surface Areas and Volumes Class 9 with answers provided with detailed solutions by looking below.

Question 1.
If a spherical balloon grows to twice its radius when inflated, then the ratio of the volume of the inflated balloon to the original balloon is
(a) it is 8 : 1
(b) it is 4 : 1
(c) it is 5 : 1
(d) it is 6 : 1

Answer: (a) it is 8 : 1

Question 2.
The length of the longest rod that can fit in a cubical vessel of side 10 cm, is
(a) 10 cm
(b) 10√2 cm
(c) 10√3 cm
(d) 20 cm

Question 3.
A right circular cone has an altitude of 40 cm and a diameter of 60 cm. The slant height of the cone is
(a) 25 cm
(b) 100 cm
(c) 75 cm
(d) 50 cm

Question 4.
If the diameter of the base of a cylindrical pillar is 4 m and its height is 21 m, then the cost of construction of the pillar at Rs. 1.50 per cubic metre is:
(a) Rs. 396
(b) Rs. 400
(c) Rs. 410
(d) Rs. 420

Question 5.
The height of a right circular cone of radius 5 cm and slant height 13 cm is
(a) 8 cm
(b) 14 cm
(c) 6 cm
(d) 12 cm

Question 6.
The curved surface area of a right circular cone whose slant height is 14 cm and base radius is 21 cm is​
(a) 308 cm2
(b) 924 cm2
(c) 232 cm2
(d) 446 cm2

Question 7.
The perimeter of one face of a cube is 40 cm. The volume of the cube (in cm3) is :
(a) 1600
(b) 1000
(c) 800
(d) 160

Question 8.
The volume of the cylinder whose height is 14 cm and diameter of base 4 cm is:
(a) 176 cm3
(b) 196 cm3
(c) 276 cm3
(d) 352 cm3

Question 9.
A beam 9 m long, 40 cm wide and 20 cm deep is made up of iron which weighs 50 kg per cubic metre. The weight of the beam is :
(a) 27 kg
(b) 36 kg
(c) 48 kg
(d) 56 kg

Question 10.
The area surrounded by a conical tent is 4526 m2. If the cost of canvas is Rs. 17 per square meter, then find the total cost of canvas.​
(a) ₹52100
(b) ₹76942
(c) ₹65000
(d) ₹85246

Question 11.
The surface area of cuboid-shaped box having length=80 cm, breadth=40cm and height=20cm is:
(a) 11200 sq.cm
(b) 13000 sq.cm
(c) 13400 sq.cm
(d) 12000 sq.cm

Question 12.
The volume of a sphere is 38808 cu.cm. The curved surface area of the sphere (in cm2) is :
(a) 5544
(b) 1386
(c) 8316
(d) 4158

Question 13.
The height of a right circular cone of radius 3.5 cm and volume 77 cm3 is​
(a) 9 cm
(b) 11 cm
(c) 4 cm
(d) 6 cm

Question 14.
he ratio of the radii of two spheres whose volumes are in the ratio 64 : 27 is
(a) it is 8 : 3.
(b) it is 16 : 9.
(c) it is 10 : 7.
(d) it is 4 : 3.

Answer: (d) it is 4 : 3.

Question 15.
If the diameter of a cylinder is 28 cm and its height is 20 cm, then total surface area (in cm2) is :
(a) 2993
(b) 2992
(c) 2292
(d) 2229

Question 16.
The radius of two similar right circular cones are 2 cm and 6 cm. The ratio of their volumes is
(a) 1 : 3
(b) 1 : 9
(c) 9 : 1
(d) 1 : 27

Question 17.
A rectangular sand box is 5 m wide and 2 m long. How many cubic metres of sand are needed to fill the box upto a depth of 10 cm ?
(a) 1
(b) 10
(c) 100
(d) 1000

Question 18.
The cost of cementing the inner curved surface of a 14 m deep well of radius 2 m at the rate of ₹2 per m2 is
(a) ₹352.
(b) ₹176.
(c) ₹56.
(d) ₹112.

Question 19.
The slant height of a cone with radius 15 cm and height 20 cm is
(a) 21 cm
(b) 20 cm
(c) 25 cm
(d) 15 cm

Question 20.
A hemispherical bowl is made of steel 0.25 cm thick. If the inner radius of the bowl is 3.25 cm, then the outer curved surface area of the bowl is
(a) 154 cm2.
(b) 77 cm2.
(c) 115.5 cm2.
(d) 38.5 cm2.

Question 21.
A conical tent is 15 m high and the radius of its base is 20 m. The cost of the canvas required to make the tent at the rate of ₹7 per m2 is​
(a) ₹10000
(b) ₹12000
(c) ₹11000
(d) ₹9000

Question 22.
The curved surface area of a right circular cylinder of height 14 cm is 88 cm2. The diameter of the base is:
(a) 2 cm
(b) 3 cm
(c) 4 cm
(d) 6 cm