2. A triangle has a perimeter of 20...
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2. A triangle has a perimeter of 200. If two of its sides are equal and the third side is 20 more than the equal sides, what is the length of the third side? RRB NTPC (Phase I) 2016 (1) 60 (2) 50 (3) 80 (4) 70

11th - 12th Class
Maths
Solution
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Períbuetu of triangle ( =200 ) [ a+b+c ] two sides are equal [ a=b ] third side is 20 more fhoun eqnal sid. then [ begin{array}{r} c=20+a a+b+c=a+a+20+a=200 end{array} ] [ a=60 ] [ c=20+60=80 ]
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