The area of a square is 144 sq. feet. What is the width of a rectangle (in feet) if its area is equal to half the area of the square and its length is 9 feet?

A 6

B 7

C 8

D 9

Correct Answer: Option C

area of rectangle is = 144/2 sq feet = 72 feet suppose, width of rectangle is X then , 9x=72 or, x =72/9 = 8 so, width=8