Answer:
The first one:
∆
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∆
Step-by-step explanation:
If you food it up, you could see that it comes up to the figure.
Plus, the others don't have triangles on both sides, and you need the shape on both sides for it to work.
Answer:
0.72 km per hour
Step-by-step explanation:
First, find the speed in meters per hour. Create a proportion where x is this speed:
= ![\frac{x}{60}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7B60%7D)
3x = 2160
x = 720
So, the speed is 720 meters per hour. Convert this to kilometers per hour by dividing 720 by 1000, since there are 1000 meters in a kilometer:
720/1000
= 0.72
So, the speed of the conveyer belt is 0.72 km per hour
The total surface area of the prism is 224 square units
<h3>Surface area of a rectangular prism</h3>
The formula for calculating the formula of a rectangular prism is expressed as:
TSA = 2(lw + wh +lh)
Given the following parameters
length = 8cm
Width = 8cm
Height = 3cm
Substitute
TSA = 2(8(8)+8(3)+8(3))
TSA= 2(64+48)
TSA = 224 square cm
Hence the total surface area of the prism is 224 square units
Learn more on surface area here: brainly.com/question/1297098
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Answer:
hh
Step-by-step explanation: