maths plse help me..
posted by sarika .
two solids of right cylendrical shape are 49 cm and 35 cm high and thier base diameters are 16 cm,14 cm respectively.Both are melted and moulded into a single cylinder,56cmhigh find its base diameter

maths plse help me.. 
Damon
pi r^2 h = pi D^2 h/4 = volume
pi * 16^2 * 49/4 + pi * 14^2 * 35/4 = pi d^2 * 56/4
pi/4 cancels
49 * 256 + 35 * 196 = 56 d^2
Respond to this Question
Similar Questions

maths
a pyramid has a spuare base with side length 20.a right circular cylinder has a diameter of 10 and a length of 10.the cylinder is lying on its side,completely inside the pyramid.the central axis of the cylinder lies parallel to and … 
geomtry
The base of a 6inch long ice cream cone with a diameter of 2 inches, is cut 0.25 inches from the base. The left over shape resembles a cylinder. What is the BEST estimate for this shape's volume? 
Math
The diagram shows a solid metal cylinder. The cylinder has base radius 2x and height 9x. E cylinder is melted down and made into a sphere of radius r. Find the expression for r in terms of x. 
maths plse help me..
Prove that the radius of the base of right circular cylinder of greatest curved surface area which can be inscribed in a given cone is half that of the cone 
Math
a) One mould forms a sculpture that is a composite object comprising a right cylinder with base diameter 15 in. and height 3 in., and a right cone with the same base diameter as the base of the cylinder and a height of 9 in. Determine … 
maths
if a hollow sphere of internal and external diameter 4cm melted 8cm respectively melted into a cone of base diameter 8cm . find the height of cone 
Maths
A metallic right circular cylinder is15cm high and the diameter of the base is 14cm it is melted and recasted into another cylinder with radius 4cm find its height and curved surface area 
maths
A cylinder is 8cm high and its base diameter is 4cm.The height of a similar cylinder is 12cm. The height of a similar cylinder is 12cm.find the diamter of the base of the larger cylinder 
Geometry
A cone has diameter 12 and height 9. A cylinder is placed inside the cone so the base of the cylinder is concentric with the base of the cone and the upper base of the cylinder is contained in the surface of the cone. If the volume … 
Geometry
A cone has diameter 12 and height 9. A cylinder is placed inside the cone so the base of the cylinder is concentric with the base of the cone and the upper base of the cylinder is contained in the surface of the cone. If the volume …