Answer any two questions : Determine the volume of a solid right circular cone which can be made from a solid wooden cube of 4.2 dcm efge length by wasting minimum quantity of wood .

If a solid right circular rod of length 1 dcm is made by melting a solid silver - sphere of diameter 6 dcm, then find the radius of the rod.

If volume of two solid right cylinder are same and their height are in the ratio 2:1 , then the ratio of lengths of radii is

If the radii and volumes of a solid right circular cone and a solid sphere be equal, then what will be the ratio of the length of diameter of the sphere and the height of the cone ?

If a right circular cone of height 15 cm and of diameter 30 cm is made from a wooden sphere of radius 15 cm , then percent of wood will be lost ?

The ratio of the volumes of two right circular cones is 1:4 and the ratio of their lengths of radii of the bases is 4:5 then the ratio of their heights is

The radius of base of a solid right circular iron - rod is 32 cm and the length of the rod is 35 cm . How many solid right circular cone of radius of base 8 cm and of height 28 cm can be made by melting this rod ?

The ratio of heights of two solid right circular cylinder is 2 : 3. If the volume of them are same, then the ratio of their diameters is

The shape of the lower part of a solid object is like a hemisphere and the upper part like a right circular cone . If the surface area of the two parts be equal , then find the ratio of the length of radius and height of the cone .

If a wooden log with a shape of rectangular parallelopiped with square cross section is made by wasting minimum wood from a right circular wooden log having the diameter of 12sqrt2 metre and length 21 metre. Calculate the quantity of remaining wood and the quantity of wasted wood.