The ratio between the length and the breadth of a rectangular park is 4 : 1. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 min, then the area of the park (in sq. m) is?	Pick one.
A) 1024545 m	B) 134561 m	C) 156787 m	D) 15450 m	E) 102400 m
Perimeter = Distance covered in 8 min. = 12000 x 8 m = 1600 m.   60   Let length = 4x metres and breadth = 1x metres.   Then, 2(4x + 1x) = 1600 or x = 160.   Length = 640 m and Breadth = 160 m.   Area = (640 x 160) m2 = 102400 m   102400 m
<result>E</result>
The ratio between the length and the breadth of a rectangular park is 4 : 1. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 min, then the area of the park (in sq. m) is?