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QueenLife4869
23.08.2021 •
Mathematics
Determine the surface area of the cylinder below.
351.9 m2
301.6 m2
251.3 m2
452.4 m2
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Ответ:
9π m²
Step-by-step explanation:
We will need calculate the area of the top, the base and sides.
Area of the top=πr²
Area of the base=πr²
Area of the side: 2πrh
Surface area of a cylinder: area of the top + area of the base +area of the side
Surface area of a cylinder=πr²+πr²+2πrh=2πr²+2πrh=2πr(r+h)
Data:
r=1.5 m
h=1.5 m
Surface area of this cylinder=2π(1.5m)(1.5 m+1.5 m)=3π m*(3 m)=9π m².
Ответ:
7(n - 9) = 3 <== ur equation
7n - 63 = 3
7n = 3 + 63
7n = 66
n = 66/7