Question

A small indoor green house is made entirely of glass panes held together with tape. It is 35cm long, 30cm wide and 25cm high.
(I)what is the area of the glass.
(ii) what length of tape is needed for all the 12 edges​

Answer 1

Answer:

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.

Answer 2

i)

Given :

• Length (l) = 30 cm
• Breadth (b) = 25 cm
• Height (h) = 25 cm

To find :

• Area of the glass (So, we will find T.S.A of the green house)

Formula used :

• Total surface area of cuboid = 2(lb + bh + hl)

According to the question,

→ Area of the green house = 2(lb + bh + hl)

= 2(30 × 25 + 25 × 25 + 25 × 30) cm²

= 2(750 + 625 + 750) cm²

= 2 × 2125 cm²

= 4250 cm²

.°. So,the area of the glass is 4250 cm²...

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ii)

Given :

• Length (l) = 30 cm
• Breadth (b) = 25 cm
• Height (h) = 25 cm

To find :

• Tape is needed for all the 12 edges.

According to the question,

→ Total length of tape = 4( l + b + h)

= 4(30 + 25 + 25)

= 320 cm

.°. 320 cm tape is required for all the 12 edges...