MCQ Questions for Class 9 Maths Chapter 13 Surface Areas and Volumes with Answers
MCQs from Class 9 Maths Chapter 13 – Surface Areas and Volumes are provided here to help students prepare for their upcoming Maths exam.
MCQs from CBSE Class 9 Maths Chapter 13: Surface Areas and Volumes
1) The formula to find surface area of a cuboid of length (l), breadth (b) and height (h) is:
a. lb+bh+hl
b. 2(lb+bh+hl)
c. 2(lbh)
d. lbh/2
Answer/ Explanation
Answer: (b)
2) The surface area of a cube whose edge equals to 3cm is:
a. 62 sq.cm
b. 30 sq.cm
c. 54 sq.cm
d. 90 sq.cm
Answer/ Explanation
Answer: (c)
Explanation: Given, a = 3 cm
Surface area of cube = 6a2
SA = 6 x 3 x 3 = 54 sq.cm
3) 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
Answer/ Explanation
Answer: (a)
Explanation: surface area of the box = 2(lb + bh + hl)
S.A. = 2[(80 × 40) + (40 × 20) + (20 × 80)]
= 2[3200 + 800 + 1600]
= 2 × 5600 = 11200 sq.cm.
4) The volume of hemisphere whose radius is r, is:
a. 4/3 πr3
b. 4πr3
c. 2πr3
d. ⅔ π r3
Answer/ Explanation
Answer: (d)
5) If the radius of a cylinder is 4cm and height is 10cm, then total surface area of cylinder is:
a. 440 sq.cm
b. 352 sq.cm.
c. 400 sq.cm
d. 412 sq.cm
Answer/ Explanation
Answer: (b)
Explanation: Total Surface Area of a Cylinder = 2πr(r + h)
TSA = 2 x 22/7 x 4(4 + 10)
= (2x22x4x14)/7
= (2x22x4x2)
= 352 sq.cm
6) 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. 3cm
c. 4cm
d. 6cm
Answer/ Explanation
Answer: (a)
Explanation: Curved surface area of cylinder = 88 sq.cm
Height = 14 cm
2πrh = 88
r = 88/2πh
r=1 cm
Diameter = 2r = 2cm
7) The Curved surface area of a right circular cylinder is 4.4 sq.cm. The radius of the base is 0.7 cm. The height of cylinder will be:
a. 2 cm
b. 3 cm
c. 1 cm
d. 1.5 cm
Answer/ Explanation
Answer: (c)
Explanation: Curved surface area of cylinder = 2πrh
2πrh = 4.4
h = 4.4/(2πx0.7)
h = 1m
8) Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. The curved surface area is:
a. 150 sq.cm
b. 165 sq.cm
c. 177 sq.cm
d. 180 sq.cm
Answer/ Explanation
Answer: (b)
Explanation: Diameter = 10.5, Radius = 10.5/2
Slant height, l = 10cm
Curved surface area of cone = πrl = π(5.25)(10)
CSA = 165 sq.cm
9) If slant height of the cone is 21cm and diameter of base is 24 cm. The total surface area of cone is:
a. 1200.77 sq.cm
b. 1177 sq.cm
c. 1222.77 sq.cm
d. 1244.57 sq.cm
Answer/ Explanation
Answer: (d)
Explanation: Total surface area = πr(l + r)
r = 24/2 = 12 cm
l = 21 cm
TSA = π12(21 + 12) = 1244.57 sq.cm
10) The surface area of a sphere of radius 14 cm is:
a. 1386 sq.cm
b. 1400 sq.cm
c. 2464 sq.cm
d. 2000 sq.cm
Answer/ Explanation
Answer: (c)
Explanation: Radius of sphere, r = 14 cm
Surface area = 4πr2
= 4 x 22/7 x (14)2 = 2464 sq.cm.