The lenght of a rectangle is greater than then the breadth by 3 cm.if the length is increased by 9cm amd the breadth is reduced by 5cm, the area remains the same. find the demension of the rectangle?
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Answer:
l=18cm b= 15cm
Step-by-step explanation:
given l= b+3
also given that length is increased by 9cm and breadth decreased by 5 cm
that means l+9 and b-5
area = l×b
given both the areas are same
that means (b+3)×b = (b+12)×(b-5)
=> b²+3b = b²+7b-60
b= 15cm then l= b+3 = 15+3= 18cm
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