The difference between outside and inside surface areas of a tube 28 cm long in 88 cm^2 .
The total surface area of the tube is 1254 cm^2 .
Can you find the outer and inner radii of the tube ?
Outer area=A1 , Inner area=A2
simplify (i) & (ii)
A hemispherical is made of steel, 0.25cm thick. The inner radius of the bowl is 5 cm. find the outer curved surface area of the bowl and also find the total surface area and volume.
Two metallic right circular cones having their height 4.1 cm and 4.3 cm and the radii of their bases 2.1 cm each, have been melted together and recast into a sphere.
What would be the diameter of the resultant sphere?
Four circles are situated in the plane so that each is tangent to the other three.
If three of the radii are 3, 4, and 5, what's the largest possible radius of the fourth circle?