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3 years ago

The lateral surface area of a cube is 400cm². Its total surface area is

Mathematics

2 answers:

OLga [1]3 years ago

8 0

Answer:

Step-by-step explanation:

Lateral surface area of cube = 4a²

4a² = 400

a² = 400÷4

a² = 100

a = √100 = √10*10

a = 10 cm

Total surface area = 6a²

= 6 * 10²

= 6* 100

= 600 cm²

Nina [5.8K]3 years ago

3 0

Answer:

Step-by-step explanation:

I believe that I did this before.

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What is the area of rhombus ABCD? Enter your answer in the box. Do not round at any steps.

Mrac [35]

Answer:

Area of the rhombus ABCD = 16 square units

Step-by-step explanation:

Area of a rhombus = $\frac{1}{2}(\text{Diagonal 1})(\text{Diagonal 2})$

From the graph attached,

Diagonal 1 = Distance between the points A and C

Diagonal 2 = Distance between the points B and D

Length of a segment between (x₁, y₁) and (x₂, y₂) = $\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^2 }$

Diagonal 1 (AC) = $\sqrt{(4-0)^2+(-1+1)^2}$ = 4 units

Diagonal 2(BD) = $\sqrt{(2-2)^2+(3+5)^2}$ = 8 units

Now area of the rhombus ABCD = $\frac{1}{2}(\text{AC})(\text{BD})$

= $\frac{1}{2}\times 4\times 8$

= 16 units²

Therefore, area of the given rhombus is 16 units².

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3 years ago

Sum of the radius of the base and height of a cylinder is 21 cm and the curved surface area of the cylinder is 616 sq.cm,find th

Kobotan [32]

Step-by-step explanation:

lets radius be r and height be h,

r+h=21 -----(1)

curved surface area

2×pi×r×h=616 -----(2)

use simultaneous eqn to solve for r and h.

total surface area of cylinder= 2×pi×r×h + 2×pi×r²

= ans if im not wrong

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3 years ago

The area of Caitlins square garden is 345 ft.². One side of the garden is next to a shed. She wants to put a fence around the ot

NikAS [45]

Hey there!!

The formula for the area of a square - s²

where s = side

s² = 345

s = √345

s = 18.57 ft

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Hope my answer helps!

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Answer:

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solniwko [45]

Answer:

bite my wrist

Step-by-step explanation:

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