Year 8 Interactive Maths - Second Edition

Problem Solving Unit

Problem 13.1  Volume of Metal

The outside diameter of the following pipe is 11.4 cm.  The inside diameter is 10.4 cm.  What volume of metal was used to make the pipe?

Problem 13.2  Largest Capacity

A manufacturer is planning to make a new can size.  Which of the following two options provides the largest capacity?

a.  A can of radius 4.8 cm and height of 12.9 cm.
b.  A can with a diameter of 10.6 cm and a height of 12.3 cm.