题目内容
两个长方形,它们周长相等,甲的长与宽之比是2:1,乙的长与宽之比是3:1,则甲与乙面积之比是______.
设两个长方形周长为a,
则甲的宽是
×
,长是
×
,甲的面积=
×
×
×
,
则乙的宽是
×
,长是
×
,乙的面积=
×
×
×
,
甲与乙面积之比=(
×
×
×
):(
×
×
×
)=32:27;
故答案为:32:27.
则甲的宽是
| a |
| 2 |
| 1 |
| 1+2 |
| a |
| 2 |
| 2 |
| 1+2 |
| a |
| 2 |
| 2 |
| 1+2 |
| a |
| 2 |
| 1 |
| 1+2 |
则乙的宽是
| a |
| 2 |
| 1 |
| 1+3 |
| a |
| 2 |
| 3 |
| 1+3 |
| a |
| 2 |
| 3 |
| 1+3 |
| a |
| 2 |
| 1 |
| 1+3 |
甲与乙面积之比=(
| a |
| 2 |
| 2 |
| 1+2 |
| a |
| 2 |
| 1 |
| 1+2 |
| a |
| 2 |
| 3 |
| 1+3 |
| a |
| 2 |
| 1 |
| 1+3 |
故答案为:32:27.
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