THIS ONE IS REALLY HARD the length of a rectangle exceeds its width by 8 cm and the area of the rectangle is 240 sq. km. find the dimensions of the rectangle.
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Let width of a rectangle be (x)cm.
Given,
Area of rectangle=240sq. km.=240000000000sq. cm.
Length of rectangle=(x+8)cm.
Area of rectangle=length*breadth
240000000000=(x+8)*x,
x^2+8x-240000000000
Factorize it and then find the value if x. Negative x is wrong answer whereas positive x is right answer because there can never be negative measures. Hence x= positive value
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