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
Surface area of 1st sphere=4πr1²
Surface area of 2nd sphere=4πr2²
Ratio=4πr1²/4πr2²=r1²/r2²=16/1=16:1
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?
The length of a rectangle is twice the diameter circle.The circumference of the circle is equal to area of a square of side 22cm.What is the breadth of rectangle if its perimeter is 668cm?