Question in photo, please help. This is the last one
1 answer:
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Answer:
602.88cm²
Step-by-step explanation:
Find the image of the cylinder attached
Surface area of a cylinder = A=2πrh+2πr²
r is the radius = 4cm
Height h = 20cm
Substitute
A = 2πr(r+h)
A = 2π(4)(4+20)
A = 8π(24)
A = 192π
A = 192(3.14)
A = 602.88cm²
Hence the surface area of the cylinder is 602.88cm²
Answer:
Step-by-step explanation:
Area of a triangle is given a half the product of base by the perpendicular height:
Given h=9cm, and b=2.9cm, the area is calculated as:
Hence, area of the triangle is 13.05 sq cm