A roll of wallpaper is 10 meters long and 0.5 meters wide. Assuming that there is no wastage, how many rolls of wallpaper would Peter require to cover the two walls?

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anonymous · Answer

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anonymous · Answer

area of the two walls = 2*(8*5) = 2*40 = 80 sqmtr
area that can be covered by one roll = 10*0.5 = 5 sq.mtr

                                       area of two walls         80 sqmtr
no of rolls required = ---------------- = ---------- = 16
                                        area of one roll            5 sqmtr