1)
The scale of a map is 1cm : 100m .
If the area of a national park on the map is 200cm*2,
what is the area of the park ?
2)
A 200cm*3 diluted bleach is a mixture of 1 part of bleach and 4 parts of water.
Find the volume of water has to be added to dilute the ratio of bleach
to water from 1:4 to 3:20.
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F6 Maths
2012-10-22 6:26 am
回答 (1)
2012-10-22 8:24 am
✔ 最佳答案
1)Area ratio: (1/100x100)^2=1x10^-8Area of park: 200/(1x10^-8) = 2x10^10 cm^2 = 2x10^6 m^2
2)volume of bleach= 200/5 =40cm*2
Volume of water need to be added:
40/(3/20) - 200(4/5) = 106.67 cm^2
收錄日期: 2021-04-13 19:04:23
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