1. The formula for calculating the volume of
a cube is:
(a) 12
(b) 13
(c) lbh
(d) lbh2
Answers
Answer:
formula = length*breadth*height
Explanation:
this is correct
Answer:
(A) Main Concepts and Results
• Cuboid whose length = l, breadth = b and height = h
(a) Volume of cuboid = lbh
(b) Total surface area of cuboid = 2 ( lb + bh + hl )
(c) Lateral surface area of cuboid = 2 h (l + b)
(d) Diagonal of cuboid = 222 lbh + +
• Cube whose edge = a
(a) Volume of cube = a3
(b) Lateral Surface area = 4a2
(c) Total surface area of cube = 6a2
(d) Diagonal of cube = a 3
• Cylinder whose radius = r, height = h
(a) Volume of cylinder = πr2
h
(b) Curved surface area of cylinder = 2πrh
(c) Total surface area of cylinder = 2πr (r + h)
• Cone having height = h, radius = r and slant height = l
(a) Volume of cone =
1 2
3
πr h
(b) Curved surface area of cone = πrl
SURFACE AREAS AND VOLUMES
CHAPTER 13
16/04/18 16/04/18
122 EXEMPLAR PROBLEMS
(c) Total surface area of cone = πr (l + r)
(d) Slant height of cone (l) = 2 2 h r +
• Sphere whose radius = r
(a) Volume of sphere =
4 3
3
πr
(b) Surface area of sphere = 4πr2
• Hemisphere whose radius = r
(a) Volume of hemisphere =
2 3
3
πr
(b) Curved surface area of hemisphere = 2πr2
(c) Total surface area of hemisphere = 3πr2
Explanation: