If the radius and the height of a cone is 3 cm and 4 cm respectively, then its slant height is .
A hollow sphere of internal and external radius 2 cm and 4 cm respectively is melted into a cone of base radius 4 cm. Find the height and slant height of the cone.
In the given figure, the circles touch the lines at X , Y , Z , B , C and D.
If PQ = 8cm , QA = 9cm and PA = 7cm, then the length PX , AZ and QY respectively are :