A hollow squareshaped tube open at both ends is made of iron The internal square is 5 cm side and th...

Question

A hollow squareshaped tube open at both ends is made of iron The internal square is 5 cm side and the length of the tube is 8 cm There are 192 cm3 of iron in this tube Find its thickness

Accepted Answer

Given that the volume of the iron in the tube 192 cm3

Let the thickness of the tube = x cm

Side of the external square = (5 + 2x) cm

The external volume of the tube - its internal volume= volume of iron in the tube

According to the question,

Selina Solutions CONCISE Maths - Class 9 ICSE chapter Chapter 21- Solids Question 9 Solution image

Then, the thickness is 1 cm.

Selina Solutions Class 9 Mathematics Solutions for Exercise 21(A) in Chapter 21 - Chapter 21- Solids