The length of a rectangle hall is 5 m more than its breadth. The area of the hall is 750 m2. The length of the hall is :  Pick:
A) 15 m  B) 22.5 m  C) 25 m  D) 30 m  E) None of these
Solution   Let breadth = x metres. Then, length = (x + 5) metres.   Then x(x+5) = 750 ⇔ x2 + 5x −750 = 0 ⇔ (x + 30) (x + 25) = 0 ⇔ x = 25.   ∴ Length = (x + 5) = 30 m. Answer 30 m
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The length of a rectangle hall is 5 m more than its breadth. The area of the hall is 750 m2. The length of the hall is :