A small indoor greenhouse is made entirely of glass

Asked by admin @ 20/08/2021 in Math viewed by 337 People

"Question 6 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. (i) What is the area of the glass? (ii) How much of tape is needed for all the 12 edges?

Class 9 - Math - Surface Areas and Volumes Page 213"

Answered by admin @ 20/08/2021

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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Hope this will help you....

Which is one cost of using tides for energy? a) alteration to tides in area b) small amounts of energy production c) inexpensive fuel d) increased greenhouse gases

Asked by maham237 @ 14/01/2021 in Chemistry viewed by 365 persons

A small indoor greenhouse is made entirely of glass

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