Question

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.
() What is the area of the glass?
(ii) How much of tape is needed for all the 12 edges?​

Answer 1

Given:

A herbarium which is cuboidal in shape whose dimensions are :-

• Length = 30 cm

• breadth = 25 cm

• height = 25 cm

Solution:

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

=> 2×(30×25 + 25×25 + 25×30)

=> 2×(750 + 625 + 750)

=> 2 × 2125

=> 4250 cm^2

(ii) 4l + 4b + 4h [Calculate sum of all edges, the 12 edges consist 4 lengths, 4 breadths & 4 heights]

=> 4×30 + 4×25 + 4×25

=> 4 × (30 + 25 + 25)

=> 4 × 80

=> 320 cm

Hence, we get the required ans

Hope this helped you dear...

Answer 2

given:

length = 30cm = l

width = 25cm = w

hieght = 25cm = h

Total surface area of cuboid = 2(lw + wh + lh)

=>2(30 ×25 + 25×25 + 30×25)

=>2(750 + 625 + 750)

=> 4250 cm²

the length of tape = 4(l +w +h)

=>4(30+ 25 +25)

=> 4 (80)

=> 320 cm²

length of the tape = 320 cm²

Step-by-step explanation:

hope it helps