Sophia wants to tie a string around a heavy permanent records storage box (25cm high x 30cm long x 20cm) and have 20cm of string left to tie a secure knot. How

Question

Sophia wants to tie a string around a heavy permanent records storage box (25cm high x 30cm long x 20cm wide) and have 20cm of string left to tie a secure knot. How long should the precut string need to be?

Answer 1

There are two possible answers to this question.

 

1. the string goes around the girth of the box, in which case, we will have 2 x width (2 x 20cm = 40cm), plus 2 x height (2 x 25cm = 50cm), plus the extra length (20cm), for a total of 110 cm/

 

2. the string goes around the length of the box, in which case, we will have 2 x length (2 x 30cm = 60cm), plus 2 x height (2 x 25cm = 50cm), plus the extra 20cm, for a total of 120cm