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For a rectangle area is 40cm square and perimeter is 28cm find the length and breadth of the rectangle |
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Answer» Let the length of rectangle be x and breadth be b. Area of triangle = l*b 40 = l*b b=40/l cm Perimeter of triangle = 2(l+b) 28 = 2(l+40/l) 14=(l2+40)/l 14l=l2+40 l2-14l+40=0 l2-10l-4l+40=0 l(l-10)-4(l-10)=0 (l-4)(l-10)=0 l=4cm or l=10cm b=40/l = 10cm or 4cm |
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