Surface Area And Volume
Bayani Gaba-gaba
Once shapes leave the flat page and become solid, two new measurements matter: how much space a solid takes up, and how much surface it has. Volume tells you the capacity of a box, a tank or a tin; surface area tells you how much material wraps it or how much paint covers it. A small family of formulas handles cuboids, prisms, cylinders, spheres, cones and pyramids.
In this lesson you will calculate the volume and surface area of the standard solids, learning how prisms all share one idea (cross-section times length) and how the curved surfaces of cylinders, cones and spheres are found. The key habit is keeping track of units: volume is always cubic and surface area always square, and confusing them is the classic mistake this lesson trains you to avoid.
Manufura
- Carry out calculations and solve problems involving the surface area and volume of a: cuboid prism cylinder sphere pyramid cone.
Takardar Darasi
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- A cuboid measures 5 cm by 4 cm by 3 cm. What is its volume? A. 12 cm^3 B. 47 cm^3 C. 60 cm^3 D. 94 cm^3 Answer: C
- A cylinder has radius 3 cm and height 10 cm. Using pi = 3.142, what is its volume to 1 d.p.? A. 94.3 cm^3 B. 188.5 cm^3 C. 282.8 cm^3 D. 942.6 cm^3 Answer: C
- A sphere has radius 6 cm. Using pi = 3.142, what is its surface area to 1 d.p.? A. 113.1 cm^2 B. 226.2 cm^2 C. 452.4 cm^2 D. 904.9 cm^2 Answer: C
- A cone has base radius 3 cm and vertical height 4 cm. Using pi = 3.142, what is its volume to 2 d.p.? A. 12.57 cm^3 B. 37.70 cm^3 C. 113.11 cm^3 D. 150.82 cm^3 Answer: B
- A pyramid has a square base of side 6 cm and vertical height 10 cm. What is its volume? A. 60 cm^3 B. 120 cm^3 C. 180 cm^3 D. 360 cm^3 Answer: B
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Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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