Q : 6 A small indoor greenhouse (herbarium) is made entirely of glass panes (including
base) held together with tape. It is 30 cm long, 25 cm wide and 25 cm high.
(ii) How much of tape is needed for all the 12 edges?
For 12 edges: Total length
=4l+4b+4h
=4(30+25+25)
=320 cm