If the perimeter of a rectangle with dimensions (2x+10) and (x+20) is 240 cm, Find the dimensions.
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Solution
perimeter is the sum of lengths and breadths of the rectangle here the dimension is (2x+10) and ( x+20) these are length and breadth we know that rectangle has 4 side , perimeter =2 *(length +breadth)=240
2(2x+10+x+20) =2*(3x+30) =6x+60 =240 6x=240-60 6x=180 x = 30 there fore the dimensions are 2x+10 and x+20 = 60+10 aned 50