Question

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?​

Answer 1

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