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Point A, B , C and D lies on a straight line 

AB : BD = 1:5

AC : CD = 7:11

Work out AB : BC : CD

 Sep 27, 2020
 #1
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A-C-D = 7:11 =  7 + 11 = 18 'units'

A-B-D = 1:5   =  3:15    = 18 'units'

 

AB : BC : CD   = 3    :   ?    :  11          ? = 18-11-3 = 4

 

3:4:11   

 Sep 27, 2020

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