Answer:
A = 99 cm²
Step-by-step explanation:
The area (A) of a triangle is calculated as
A = bh ( b is the base and h the perpendicular height )
Here b = 18 and h = 11 , then
A = × 18 × 11 = 9 × 11 = 99 cm²
Answer:
Packaging with cube will be more efficient.
Step-by-step explanation:
Given:
A cube and a sphere where the diameter of the sphere is equal to the height of the cube.
Let the height of the cube "x"
Radius of the sphere =
Formula to be used:
Surface area of the cube = and Surface area of the sphere =
Volume of the cube = and Volume of the sphere =
We have to compare the ratio of SA and Volumes.
Ratio of SA : Ratio of their volumes :
⇒ ⇒
⇒ ⇒
⇒ ⇒
⇒ ⇒
⇒ ⇒
⇒ approx ⇒ approx
⇒ ⇒
Packaging of the toy with the cube will be more efficient as it has more volume comparatively.