Given
Length of greenhouse (l) = 30 cm
Breadth of greenhouse (b) = 25 cm
Height of greenhouse (h) = 25 cm
Find out
We have to find the
(i)What is the area of the glass?
(ii)How much tape is needed for all the 12 edges?
Solution
(i) Area of glass = total surface area of greenhouse
= 2 (lb + bh + lh)
= 2 (30 * 25 + 25 * 25 + 30 * 25)
= 2 (750 + 625 + 750)
= 4250 cm2
Therefore, area of glass is 4250 cm2.
(ii) Length of tape needed = perimeter of the greenhouse
= 4 (l + b + h)
= 4 (30 + 25 + 25) cm
= 320 cm.
Therefore, the length of tape needed is 320 cm.