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.

(i) Length of green house l = 30 cm, breadth b = 25 cm and height h = 25 cm
Total surface area of green house = 2(lb + bh + hl)
= 2(30 × 25 + 25 × 25 + 25 × 30) cm² = 2(750 + 625 + 750) cm²
= 2(2125) cm²
= 4250 cm²
Hence, the area of glass for green house is 4250 cm²
(ii) Length of green house l = 30 cm, breadth b = 25 cm and height h = 25 cm
Length of tape for all 12 edges (4 lenght, 4 Breath and 4 Height) = 4(l + b + h)
= 4(30 + 25 + 25) cm = 4(80) cm
= 320 cm
Hence, for all 12 edges, 320 cm tape is required.