11. in a competitive exam positive 4 was alloted for each correct answer and negative 2 was
alloted for each incorrect answer Aakanksha appeared for the exam and attempted 43
questions out of 100. If she is certain that she has marked-35 correct answers calculate
the marks obtained by her
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Answer:
Given angle of pentagon are x,x+20,x+40,x+60 and x+80
We know that sum of angle of pentagon =540
0
Then x+x+20+x+40+x+60+x+80=540
⇒5x+200=540
⇒5x=540−200
⇒x=
5
340
=68
o
Then smallest angle of pentagon is 68
o
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