Area Q33

33. The length of a rectangualr hll is 5m more than its breadth. The area of the hall is 750 m. The length of the hall is

  A. 15 m                             B. 22.5 m

  C. 25 m                             D. 30 m

Answer:

Let the length = xmetres.

Then length = (x +5)metres.

Then,x(x +5)= 750

= x² + 5x - 750= 0

(x+30)(x-25)= 0

x=25.