We have to find the length of the pipe given that,
A solid cuboid of iron with dimensions 53 cm x 40 cm x 15 cm is
melted and recast into a cylindrical pipe. The outer and inner
diameters of pipe are 8 cm and 7 cm respectively.
One of the important question for the board exam class 10 from
mensuration chapter.This question is from r d sharma class 10 maths.
chapter-16 question number-23 maths r d sharma,mensuration.