Graham has a plank of wood of length 610cm, correct to the nearest 10cm. He uses a cutting machine cut the plank into pieces, without any wastage. Each piece of wood is of length 15cm, correcto to the nearest half centimetre.
Find the maximum number of pieces of wood that Graham can be certain of getting.
2006-09-17 19:29:02 · 3 answers · asked by pm 1 in Science & Mathematics ➔ Mathematics
length of wood = 610 cm +/- 5 cm (correct to the nearest 10cm)
Piece of wood = 15 cm +/- 0.25 cm (correcto to the nearest half centimetre)
Maximum = (610 + 5)/(15-0.25) = 615/14.75 = 41.7 = 41 pieces
certain of getting:
(610-5)/(15+0.25)= 605/15.25 = 39.7 = 39 pieces
2006-09-17 19:43:29 · answer #1 · answered by Anonymous · 0⤊ 0⤋
38
2006-09-17 19:33:47 · answer #2 · answered by Demiurge42 7 · 0⤊ 0⤋
38
2006-09-17 19:32:48 · answer #3 · answered by testtaker 2 · 1⤊ 0⤋