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用戶147720

2008-08-08 2:48 am

The length of the sides of a triangle are in the ratio 2:4:5.

If their total length is 66 cm, find the length of each side.

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更新1:

打少左sor A distance of2km is represented by 1 cm on map (a) Find the scale of the map. (b) A pool has an area of 2cm2次方 on the map. Find its actual area

回答 (1)

STEVIE-G™

2008-08-08 2:59 am

✔ 最佳答案

1.
let the length of the sides of a triangle be 2x,4x,5x
2x+4x+5x=66
11x=66
x=6
the length of the sides of a triangle are 12,24,30.
2(a)
2km:1cm
=2000m:1cm
=2000*100cm:1cm
=200000:1
(b)
1cm:2km-->1cm^2=4km^2
1cm^2 on the map is equal to actual area 4km^2
so ,
2cm^2 on the map
=2*4km^2 actually
=8km^2

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