Question

Q-5 Do as directed.
8. If the length of a cube is 2 cm then find the surface area of the cube?
9. The length of cuboid is 6cm, width 3 cm and height 1 cm, then find the volume of
cuboid.
10. If the radius of a cylinder is 14 cm and the height is 5 cm, then find the volume of
this cylinder. (1 = =)
22
7​

Answer 1

8th answer = 24 cm^2

9th answer = 18 cm^3

10th answer = 440 cm^3

Step-by-step explanation:

8. surface area of cube = 6 × (side) ^2

= (6×2×2) cm^2

= 24 cm^2

9. volume of cuboid = Lenght × Breadth × Height

= ( 6 × 3 × 1 ) cm^3

= 18 cm^3

10. Volume of Cylinder = 2 × π × r^2 × h

= (2 × 22/7 × 14 × 5) cm^3

= 440 cm^3

Hope it helped you.

Answer 2

Step-by-step explanation:

8th ans:

• length of cube is 2cm

$surface \: area \: of \: cube = 6 {a}^{2}$

• surface area of cube= 6×(2)^2 =24cm^2.

9th ans:

• length of cuboid is 6cm
• width=3cm
• height =1cm

$volume \: of \: cuboid = lbh$

• volume of cuboid =6×3×1 = 18cm^3.

10th ans:

• radius of cylinder=14cm
• height =5cm

$volume \: of \: cylinder = \pi {r}^{2} h$

• volume is cylinder =(22÷7)(196)(5) = 3080cm^2

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