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kelly1027
30.03.2020 •
Mathematics
Perimeter of a rectangular sticker is 26 centimeters. The area is 30 centimeters. What are the dimensions?
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Ответ:
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Given:-perimeter of rectangle=26cmArea of rectangle=>30cm²{•°• perimeter of rectangle=2(l+b) }{•°•. Area of rectangle=lxb}So, 2(l+b)=26 =>(l+b)=26/2 =>l+b=13 =>l=(13-b) ----------(1)Again, =>lxb=30 =>(13-b)xb=30 {putting the value of l from equation 1} =>13b-b²=30 =>b²-13b+30=0 =>b²-10b-3b +30=0 =>b(b-10)-3(b-10)=0 =>(b-10)(b-3)=0 or, =>b=10 or b=3putting the value of b in equation (1) =>l=(13-b) =>l=13-10=3 { taking b=10} =>l=13-3=10 { taking b=3}Hence, length=3 when breadth=10 length=10 when breadth=3•take care°mark as brainlist please•follow me✌️✌️
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