a small indoor grrehouse (herbarium) is made entirely of glass panes (including bass) 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
Answers
Answer: (i) 4250 cm^2
(ii) 320 cm
Step-by-step explanation:
Given: Dimensions of herbarium:
l = 30 cm, b = 25 cm, h = 25 cm
i) Area of the glass=Total surface area of herbarium = 2(lb + bh + lh)
= 2(30×25 + 25×25
+ 25×30)
= 2(750+625+750)
=2×2125
= 4250cm²
(ii) Herbarium in in the shape of cuboid.
So Length of the required
tape will be equal to total length of edges of cuboid.
Length of the tape= 4(l + b + h)
= 4(30 + 25 + 25)
= 4× 80
= 320 cm.
Tape needed for all the 12 edges = 320 cm
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