A small indoor greenhouse (herbarium) is made entirely of glass panes (including base) held with tape. It … of tape is needed for all…
Answers:
Here, l = 30 cm, b = 25 cm, h = 25 cm
(i) Area of the glass = 2 (lb + bh + hl)
= 2(30 x 25 + 25 x 25 + 25 x 30) = 2(750 + 625 +750)
= 4250 cm2
(ii) Tape needed for all the 12 edges = 4(30 + 25 + 25) = 320 cm.