Directions: Read the following problems carefully and write the letter of the correct answer on your activity notebook.
1) What is the surface area, in square inches, of a four-inch cube?
A. 24 in²
B. 96 in²
C. 192 in²
D. 384 in²
2) What is the surface area of a cone with a radius of 2cm and slant height of 6cm?
A. 30.24 cm²
B. 36.73 cm²
C. 48.34 cm²
D. 50.24 cm²
3) Find the surface area of a cylinder with a radius of 5cm and height of 10 cm.
A. 370 cm²
B. 391 cm²
C. 468 cm²
D. 471 cm²
1) What is the surface area, in square inches, of a four-inch cube?
A. 24 in²
B. 96 in²
C. 192 in²
D. 384 in²
2) What is the surface area of a cone with a radius of 2cm and slant height of 6cm?
A. 30.24 cm²
B. 36.73 cm²
C. 48.34 cm²
D. 50.24 cm²
3) Find the surface area of a cylinder with a radius of 5cm and height of 10 cm.
A. 370 cm²
B. 391 cm²
C. 468 cm²
D. 471 cm²
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Answer:
1.b
2.d
3.d
Step-by-step explanation:
1.Get the area of the 1 side first
A = s^2 ; s= 4 in
A = 4^2
A = 16 in2
since a cube has 6 faces
SA = 6A
SA = 6*16
SA = 96 in2
2.Step-by-step explanation:
Right circular cone
Solve for surface area
A≈50.24cm²
r Radius
2
cm
l Slant height
6
cm
3.Given
The Radius of a solid cylinder (r)=5cm
Height (h)=10cm
Hence
Total surface area =2πrh+2πr
2
=2πr(h+r)
=2π×5(10+5)
=π×10×15
=150πcm
2
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