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Probability
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.
(i) What is the area of the glass?
(ii) How much of tape is needed for all the 12 edges?
Solution
(i) For herbarium
l = 30 cm b = 25 cm h = 25 cm
Area of the glass = 2(lb + bh + hl)
= 2[(30)(25) + (25)(25) + (25)(30)] = 2[750 + 625 + 750] = 4250 cm2.
(ii) The tape needed for all the 12 edges = 4 (l + b + h)
= 4(30 + 25 + 25) = 320 cm.
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Some More Questions From Probability Chapter
A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high.
(i) Which box has the greater lateral surface area and by how much?
A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high.
(i) Which box has the greater lateral surface area and by how much?
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?
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Mock Test Series
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