A small indoor greenhouse (her barium) is made entirely of glass panes

1.	A small indoor greenhouse (her barium) 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) What is the area of the glass ? (ii) How much of tape is needed for all the 12 edges ?
Answer» (i) Length of Herbarium, l = 30 cm, breadth, b = 25 cm. height, h = 25 cm. ∴ TSA of Herbarium = 2 (lb + bh + Hi) = 2 [30 × 25 + 25 × 25 + 30 × 25] = 2 [750 + 625 + 750] = 2 (2125) = 4250 cm² . (ii) Tape required for all 12 edges means, it has 4 length, 4 breadth and 4 heights. ∴ Length of tape required = 4 (l + b + h) = 4 (30 + 25 + 25) = 4 × 80 = 320 cm.

A small indoor greenhouse (her barium) 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) What is the area of the glass ? (ii) How much of tape is needed for all the 12 edges ?

Answer»

(i) Length of Herbarium, l = 30 cm,

breadth, b = 25 cm.

height, h = 25 cm.

∴ TSA of Herbarium = 2 (lb + bh + Hi)

= 2 [30 × 25 + 25 × 25 + 30 × 25]

= 2 [750 + 625 + 750]

= 2 (2125) = 4250 cm² .

(ii) Tape required for all 12 edges means, it has 4 length, 4 breadth and 4 heights.

∴ Length of tape required

= 4 (l + b + h)

= 4 (30 + 25 + 25)

= 4 × 80

= 320 cm.