Maths problem: how to do （b), and (c). Thanks?
回答 (1)
2021-01-19 1:19 pm
✔ 最佳答案
(a)x = 2V/(zl)-y
(b)
l = 9cm, V = 459cm^3.
z = 6cm, y = x + 3cm.
∴ 459 = (2x+3)×6×9/2
∴ x = 7cm
(c)
V = 459cm^3, l = 18cm, z = 3cm
∴ x + y = 2V/(zl)
= 2(459)/(18×3) = 17cm ≠ 18cm
收錄日期: 2021-04-24 08:14:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20210119015202AAqdmTU