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Solve question number 'e' |
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Answer» LET , OLD breadth TAKEN as =b old length taken as =b+9 the old area=x the new length is INCREASED by 3=b+9+3=b+12 the new breadth increased by 3=b+3 the new area=84 according to the problem, (b+12)(b+3)-(b+9)b=84cm b^2+3b+12b+36-9b=84cm 6b=84-36cm b=48÷6 b=8 :the old length =8+9=17 the old breadth=8 |
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