A ceramic piece must be made 100 centimeters long. The clay shrinks 17% when fired. How long should the piece be made before firing?
2007-06-04 21:12:35 · 3 answers · asked by lilnessaslove 1 in Science & Mathematics ➔ Mathematics
120.5cm. If 17% is taken away, you're left with 83%. So 100cm is 83% of what?
0.83*x=100cm, or
x=(100/0.83)cm =120cm
2007-06-04 21:17:22 · answer #1 · answered by supastremph 6 · 1⤊ 1⤋
Let x = the length of clay before firing
17% = .17
x - .17x = 100
.83x = 100
x = 100/.83
x = 120.48 cm ==> you need this length to get 100 cm of ceramic piece
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to check
17% of 120.48 = 20.48 cm ==> amount of shrinkage
120.48 - 20.48 = 100 cm
2007-06-05 04:19:01 · answer #2 · answered by detektibgapo 5 · 0⤊ 1⤋
Get 17% of 100cm (17) and add to it ...
= 117cm
2007-06-05 04:22:43 · answer #3 · answered by Anonymous · 0⤊ 0⤋