[計量] PP1-DS-214
214. 20789-!-item-!-187;#058&013258
The cost of a square slab is proportional to its thickness and also
proportional to the square of its length. What is the cost of a square
slab that is 3 meters long and 0.1 meter thick?
(1) The cost of a square slab that is 2 meters long and 0.2 meter thick is
$160 more than the cost of a square slab that is 2 meters long and 0.1 meter
thick. 讣
(2) The cost of a square slab that is 3 meters long and 0.1 meter thick is
$200 more than the cost of a square slab that is 2 meters long and 0.1
meter thick.
答案D
想問題目的意思是怎麼用數學式表示較正確呢?
查了精華區的討論總覺得還是怪怪的...
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