Document page
mathematicsprinted 92 · PDF 93
165 pagesrevision 46935
printed 92 · PDF 93
Page image rendered from the stored file at 110 dpi; it sharpens as you zoom. Outlines are placed from each region’s stored position on the page (595 × 842 pt).
readable
Source of this text: embedded text layer. The better of the embedded text and OCR is kept.
92
Q8a) - The distance marked as 20.1 cm comprises the width of the cuboid
from one of its faces, and two instances of the height of the cuboid from two
separate faces. Hence, 2H + W = 20.1 cm. Similarly, the distance marked as
37.8 cm comprises two lengths and two heights. They are heights because
once the net is folded, these lengths will be vertically upright. So 2H + 2L =
37.8 cm. Given the ratio W:L = 1:2, we know that L = 2W. So 2H + 2(2W) =
37.8 cm. 2H + 4W = 37.8 cm. Subtracting the other equation from this, we get