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26 Apr 2019, 09:45
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An architect is planning to incorporate several stone spheres of different font-sizes into the landscaping of a public park, and workers who will be applying a finish to the exterior of the spheres need to know the surface area of each sphere. The finishing process costs $92 per square meter. The surface area of a sphere is equal to 4пr`2, where r is the radius of the sphere.
In the table, select the value that is closest to the cost of finishing a sphere with a 5.50-meter circumference as well as the cost of finishing a sphere with a 7.85-meter circumference.
Can someone explain me, please, how to count this? From the circumference formula I can find a diameter and radius of sphere, but I don't understand what to do further with this data.
In the table, select the value that is closest to the cost of finishing a sphere with a 5.50-meter circumference as well as the cost of finishing a sphere with a 7.85-meter circumference.
Can someone explain me, please, how to count this? From the circumference formula I can find a diameter and radius of sphere, but I don't understand what to do further with this data.
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26 Apr 2019, 09:50
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You can find the area
now cost is 92 dollars per square meter
you can divide the area by per square cost to find the total cost
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now cost is 92 dollars per square meter
you can divide the area by per square cost to find the total cost
Posted from my mobile device
26 Apr 2019, 10:23
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Sorry, I didn't mention that the correct answer for the 5,5 sphere is 900$ and for 7,85 sphere - 1800$
To find the area was the first what I did, but I can't come to these numbers
To find the area was the first what I did, but I can't come to these numbers
