a bulletin board of length 150 cm and width 80 cm is to be decorated along the border with coloured ribbons. if three times the boundary length is required for the decoration how much ribbon would be required. If ribbons are available in rolls of 2m each, how many rolls would be required
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Answer:
Assumption:
Let L denote the length of the bulletin board and W denote the width.
To find, total border (TB), total decoration length (TD) and Total number of rolls required (TR)
Given:
L = 150 cm
W = 80 cm
Therefore,
Total border (TB) = 150*2 + 80*2 = 460 cm
Total decoration length (TD) = 460*3 = 1380 cm = 13.8 m
Total number of rolls required (TR) = 13.8/2 = 6.9 = 7 rolls
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