The curved surface area of two spheres are in the ratio 1:4.Find ratio of their volumes.
Ratio =1:4
Ratio of radii=1:2
Ratio of volume=4/3(∏r1³)/(4/3*∏r2³)=r1³/r2³=1/8=1:8
Spheres A and B have their radii 40cm and 10cm respectively.The ratio of surface area of A to the surface area of B is
Find the volume of a sphere whose radius is 7cm.
Find the volume and surface area of a sphere of diameter 42cm.
The difference between the circumference and radius of a circle is 74cm.Find area of the circle.
A circle and a rectangle have the same perimeter.The sides of the rectangle are 40cm and 26cm.What is the area of the circle?