-
CLASS8
The Volume of a right circular cylinder is 1100cm3 and the radius of its base is 5 cm. Calculate its curved surface area.
-
6 Replies
-
Volume of a cylinder=2×π×r×h
1100=722×52×h {∵volume=1100cm3isgiven}
h=14cm
C.S.A=2×722×5×14
C.S.A=440cm2
-
Volume of cylinder=π.r.r.h
1100=22x5x5xh/7
h=14cm
C.S.A.=2πrh
C.S.A.=2x22x5x14/7
C.S.A.=440cm^2
-
Answer is approximately 552.5 cm^2
-
Given
Volume of Right Circular Cone = 1100cm³
Radius of base = 5cm
To Find
Curve surface area
Formula we use
Volume of Cone =1/3πr²h
Curve surface area = πrh
Where , r = Radius of Base , h = Height of cone
Now unknown value is Height of cone we get height of cone from volume formula
1100cm³ = 1/3π(5cm)²h
1100cm³ × 3 = π × 25cm² × h
3300cm³ = π × 25cm² × h
3300cm³ / 25cm² = π×h
132cm/π = h
Now we get value of h so we Easily Find curve surface area
Curve surface area = πrh
Curve surface area = π×5cm×132cm/π
Curve surface area = 5cm × 132cm
Curve surface area = 660cm²Answer
- Curve surface area = 660cm²
-
Given
Volume of Circular Cylinder = 1100cm³
Radius of base = 5cm
To Find
Curve surface area
Formula we use
Volume of Cylinder =πr²h
Curve surface area = 2πrh
Where , r = Radius of Base , h = Height of cone
Now unknown value is Height of cone we get height of Cylinder from volume formula
1100cm³ = π(5cm)²h
1100cm³= π × 25cm² × h
1100cm³ = π × 25cm² × h
1100cm³ / 25cm² = π×h
44cm/π = h
Now we get value of h so we Easily Find curve surface area
Curve surface area = 2πrh
Curve surface area = 2π×5cm×44cm/π
Curve surface area = 10cm × 44cm
Curve surface area = 440cm²Answer
Curve surface area = 440cm²
-
Log in to reply.