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Let height be x then breadth is 6+x now 1/2 *b*h=56
after puting values we get
6x+x^2 - 112=0
x+14x-8x-112=0
x(x+14)-8(x+14)=0
(x+14)(x-8)=0
so x=8(it cant be negative so we discard 14)
so
breadth=14

Let the height be x therefore, base = 6+x area of triangle = 56 sqcm as per question 1/2*b*h = area of triangle 1/2*x+6*x = 56 sqcm x2 + 6x/2 =56 x2 + 6x = 56×2 = 112 x + 6 = 112/ x by trial and error method x = 7 cm x + 6 = 13 cm