Question

write the formula of surface area and volume. class 9th math. ​

Answer 1

Answer:

1.Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.

Step-by-step explanation:

2.Whereas the basic formula for the area of a rectangular shape is length × width, the basic formula for volume is length × width × height.

Answer 2

Answer:

Name Perimeter Total Surface Area

Cuboid 4(l+b+h) 2(lb+bh+hl)

Cube 6a 6a2

Cylinder —- 2 π r(r+h)

Cone —- π r(r+l)