Question

A small indoor greenhouse is made entirely of glass panes held together with tape. It is $30cm$ long, $25cm$ wide and $25cm$ high. How much of tape is needed for all the 12 edges?

Answer 1

Given,
Length, $l=30cm$

Breadth, $b=25cm$

Height, $h=25cm$

Length of the tape
$=$ sum of all the edges of the green house
$=4l+4b+4h$
$=(4\times 30)+(4\times 25)+(4\times 25)$
$=320\text{cm}$