1.

Ex. 3. Asmall indoor greenhouse (herbarium) is made entirely of glass panes (includingbaetogether with tape. It is 30 cm long, 25 cm wide and 25 m high. INCERTT() What is the area of glass?(ii) How much of tape is needed for all the 12 edges ?3025

Answer»

1) Dimensions of greenhouse:

l = 30 cm, b = 25 cm, h = 25 cm

Total surface area of green house = 2(lb + bh + lh)

= 2(30×25 + 25×25 +25×30)

= 4250 cm2

(ii) Length of the tape needed = 4(l + b + h)

= 4(30 + 25 + 25)

= 320 cm



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