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2 years ago

10

How to find the surface area of a cube

2 answers:

Basile [38]2 years ago

5 0

Answer:

surface area of a cube is the sum of areas of all the faces of cube , that covers it . the formula for the surface area is equal to six times of square of length of the sides of cubes , it is represented by 6a^2 , where a is the side length of cube , it is basically the total surface area.

bixtya [17]2 years ago

4 0

Answer:

A=6a^2 this is the formula that you would use

Step-by-step explanation:

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3 years ago

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3 years ago

PLEASE I NEED THIS <br> SO MANY POINTS

katovenus [111]

The speed of Sali is 18.75 km/hr.

Given,

Total distance travelled by Jane and Sali =63 km.

The total time is taken by Jane=3.5 hours.

Sali started to cycle 4 minutes after Jane started to cycle $=\frac{4}{60}=\frac{1}{15}$ hours.

<h3>What is the formula to find speed?</h3>

The formula to find speed is $Speed=\frac{Distance}{Time} \ km/hr$ .

The speed of Jane $=\frac{63}{3.5}=18 \ km/hr$ .

Let the speed of Sali be $x \ km/hr$ .

Sali caught up with Jane when they had both cycled 30 km.

Thus, $\frac{30}{18}-\frac{30}{x}=\frac{1}{15}$

$\implies \ \frac{30x-540}{18x} =\frac{1}{15}$

$\implies \ 15(30x-540)=18x$

$\implies \ 5(30x-540)=6x$

$\implies \ 150x-2700=6x$

$\implies \ 144x=2700\implies \ x=18.75$

Therefore, the speed of Sali is 18.75 km/hr.

To learn more about the speed visit:

brainly.com/question/7359669.

#SPJ1

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2 years ago