Answers

2014-08-31T18:58:30+08:00
3:7=20
3N : 7N =20                             3(2) : 7(2) = 20
    10N  =20                                 6 :  14  = 20
       N  = 20/10
       N = 2

The lengths are 6 and 14
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What is "N"? :)
N represents the missing number to multiplied to get the lengths
2014-08-31T21:51:16+08:00
Since the total parts are  3+7 =10
then the length of the parts are

3/10*20 = 6ft     &    7/10*20= 14ft
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