Question

please answer questions 30 and 31

Answer 1

30) AB=15
      CD=25
      AB+CD=40

Answer 2

30)AD=45cm
AC=20cm
BD=30cn
Sol:-
CD=AD-AC
= 45-20
= 25cm.
AB=AC-BD
=45-30
=15cm.
AB+CD=25+15
= 40
So, option 3

31)AD=(5x+20)cm
AB=(x+10)cm
CD=(2x+5)cm
Sol:-
AC=AD-CD
=(5x+20)-(2x+5)
5x+20-2x-5
(3x+15)cm
BD=AD-AB
(5x+20)-(x+10)
5x+20-x-10
(4x+10)cm
So, AC+BD
(3x+15)+(4x+10)
3x+15+4x+10
(7x+25)cm
Hope it help you!!!!

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