Related Questions

A solid cone of height 36 cm and radius of base 9 cm is melted to form a solid cylinder of radius 9 cm and height 9 cm. What percent of material is wasted this process?
A 25
B 5
C 0
D 10
The height and weighs of a solid cone are 6 cm and 2.7 kg. The weighs of a similar cone of 5 cm height is _____ .
A 9.75 kg
B 9.25 kg
C 6.25 kg
D 5.75 kg
A sector of a circle of radius 5 cm is recast into a right circular cone of height 4 cm. What is the volume of the resulting cone?
A 12π cm2
B 33π cm3
C 32π cm2
D 4π cm2
The C.G. of a thin hollow cone of height ‘h’, above its base lies on the axis, at a height of
A $$\frac{{\text{h}}}{3}$$
B $$\frac{{\text{h}}}{4}$$
C $$\frac{{2{\text{h}}}}{3}$$
D $$\frac{{3{\text{h}}}}{4}$$
The C.G. of a right circular cone lies on its axis of symmetry at a height of
A $$\frac{{\text{h}}}{2}$$
B $$\frac{{\text{h}}}{3}$$
C $$\frac{{\text{h}}}{4}$$
D $$\frac{{\text{h}}}{5}$$
The height of a cone is 24 cm and the area of the base is 154 cm2. What is the curved surface area (in cm2) of the cone?
A 484
B 550
C 525
D 515
If a cylinder of radius 7 cm and height 9 cm is melted and constructed into a cone of the same radius, what will be the height of this cone?
A 54 cm
B 9 cm
C 27 cm
D 13.5 cm
Centre of gravity of a solid cone lies on the axis at the height
A One fourth of the total height above base
B One third of the total height above base
C One-half of the total height above base
D Three eighth of the total height above the base
Center of gravity of a solid cone lies on the axis at the height
A One-fourth of the total height above base
B One-third of the total height above base
C One-half of the total height above base
D Three-eighth of the total height above the base
The volume of a rectangular solid is to be increased by 50% without altering its base. To what extent the height of the solid must be changed.
A 50%
B 40%
C 30%
D 20%

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