ruchiamin2633
08.10.2019 •
Mathematics
Ineed to find surface area of a cylinder. formula being used: s.a= l x w +
the given diameter: 6yd
given length: 12yd
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Ответ:
90π yd²
Step-by-step explanation:
the surface area of a cylinder is the sum of the lateral area and twice the aera of one end of the cylinder: π·d·l, where l represents the length of the cylinder. Here, the lateral surface area is π·6 yd·12 yd, or 72π yd².
The two ends add the following to the total surface area:
2·π·(d/2)², or 2π·d²/4.
Thus, the total surface area of the cyl. is
A = 2π·(6 yd)²/4 + 72π yd², or
A = 18π yd² + 72π yd² = 90π yd²
Note: Please check your source. L x W + 2pi ·r ^2 is incorrect.
Ответ:
12x+6y+12
Step-by-step explanation:
6(2+x+x+y)
=(6)(2+x+x+y)
=(6)(2)+(6)(x)+(6)(x)+(6)(y)
=12+6x+6x+6y
=12x+6y+12