A hemisphere of lead of radius 8 cm is cast into a right circular cone of base radius 8 cm. Determine the height of the cone, correct to two places of decimals.
15 cm
16 cm
14 cm
14 cm
B.
16 cm
177 Views
Advertisement
Two cones have height volumes in the ratio 3 : 1 and their heights are in the ratio 1 : 3, then the ratio of their radius is
1 : 3
1 : 9
3 : 1
3 : 1
C.
3 : 1
111 Views
The curved surface area of height circular cone is 12320 cm2. If the radius of the base is 56 cm, find its height.
Here, we have r = 56 cm and, Curved Surface Area = 12320
Hence, height of one cone = 42 cm.
731 Views
The radius and height of a cylinder are in the ratio 5:7 and its volume is 550 cm3. Find its radius.
Let radius (r) = 5x and height (h) = 7x. Now. Volume = 550
x = 1 ∴ The required radius = 5x = 5 x 1 = 5cm.
1498 Views
A granary is in the shape of a cuboid of size 8m x 6m x 3m. If a bag of grain occupies a space of 0.65 m3. How many bags can be stored in the granary?