The ratio between the length and the breadth of a rectangular park is 1 : 4. 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?	Select:
A) 124545 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 = 1x metres and breadth = 4x metres.   Then, 2(1x + 4x) = 1600 or x =160.   Length = 160 m and Breadth = 640 m.   Area = (160 x 640) m2 = 102400 m   102400 m
<result>E</result>
The ratio between the length and the breadth of a rectangular park is 1 : 4. 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?