Answer:
The surface area of the cylinder is ![\mathbf{70\pi\;\textbf{cm}^2}](https://tex.z-dn.net/?f=%5Cmathbf%7B70%5Cpi%5C%3B%5Ctextbf%7Bcm%7D%5E2%7D)
Step-by-step explanation:
The surface area of a cylinder is express
![S=2\pi rh](https://tex.z-dn.net/?f=S%3D2%5Cpi%20rh)
where
is the radius of the cylinder and
its height
Therefore, if the radius of the cylinder is
![r=5\;\text{cm}](https://tex.z-dn.net/?f=r%3D5%5C%3B%5Ctext%7Bcm%7D)
and its height
![h=7\;\text{cm}](https://tex.z-dn.net/?f=h%3D7%5C%3B%5Ctext%7Bcm%7D)
the surface area should be
![S=2\pi r h\\S=2\pi (5\;\text{cm})(7\;\text{cm}) \;\;\;\;\;\Rightarrow\;\;\;\;\; \mathbf{S=70\pi\;\textbf{cm}^2}](https://tex.z-dn.net/?f=S%3D2%5Cpi%20r%20h%5C%5CS%3D2%5Cpi%20%285%5C%3B%5Ctext%7Bcm%7D%29%287%5C%3B%5Ctext%7Bcm%7D%29%20%5C%3B%5C%3B%5C%3B%5C%3B%5C%3B%5CRightarrow%5C%3B%5C%3B%5C%3B%5C%3B%5C%3B%20%5Cmathbf%7BS%3D70%5Cpi%5C%3B%5Ctextbf%7Bcm%7D%5E2%7D)
The car is travelling at 90 kilometers per hour (90 kmph)
What is the car's speed in kilometers per minute?)
We know 1 hour = 60 minutes,
90 km / 60 minutes = 1.5 kilometers per minute
<em>The speed of the car is 1.5 kilometers per minute
</em>
How many kilometers will the car travel in 15 minutes?)
We know that the car travels 1.5 kilometers in 1 minute. So in 15 minutes:
1.5 kilometers * 15 minutes = 22.5 kilometers
The car will travel 22.5 kilometers in 15 minutes.
Answer:for #2 it's answer 1. #3 is " five less than twice a number is 2x-5. Then 5 times the sum of two numbers if 5x+y. The the difference of 5 and a number squared is (5-x)*2
Step-by-step explanation:
Hope this helps
Answer:
the answer is a
Step-by-step explanation:
hope this helps