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1 answer:
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Answer:
Note: The expression "h =300- pi r /pi r" would equate to 299, as written. I find h = (300 - π )/πr to be the equation for height.
Step-by-step explanation:
The total surface area of a sylinder is 2πr(h+r) where h is the height and r is the radius. That consists of top and bottom disks, each with an area of π, for a total of 2π
. The side is a continous sheet that has an area of 2πrh, where h is the height. 2πr is the circumference of the can, so the surface area of the side is 2πrh.
The total surace area of a closed cylinder is therefore 2π + 2πrh.
2π + 2πrh = 600
π + πrh = 300
πrh = 300 - π
h = (300 - π )/πr
Question is Incomplete;Complete question is given below;
Arla and kal both work in jobs they get paid by the hour in their first week on the job they each worked 40 hours and together there total earnings were $1300 in their second week on the job business was slow so arla worked 20 hours and kal worked 16 hours their total pool earning was $580 what is each persons hourly wage.
Answer:
The hourly wage of Arla is $15 and hourly wage of Kal is $17.5.
Step-by-step explanation:
Let the hourly wage of Arla be
Also Let the hourly wage of Kal be
Now Given:
first week on the job they each worked 40 hours and together there total earnings were $1300
So we can say that;
⇒ equation 1
Also Given:
Number of hours worked by Arla in second week = 20
Number of hours worked by Kal in second week = 16
Total Money earned in second week = $580
So we can say that;
⇒ equation 2
Now Multiplying equation 2 by 2 we get;
Applying Distributive property we get;
⇒ equation 3
Now Subtracting equation 3 from equation 1 we get;
Now Dividing both side by 8 we get;
Now Substituting the value of y in equation 1 we get;
Hence The hourly wage of Arla is $15 and hourly wage of Kal is $17.5.