The ratio between the length and the breadth of a rectangular park is 2 : 3 If a man cycling along the boundary of the park at the speed of 10 km/hr completes one round in 18 min, then the area of the park (in sq. m) is? Choose the correct choice:  A) 3000 m  B) 9000 m  C) 540000 m  D) 10000 m  E) 54000 m
Perimeter = Distance covered in 8 min. = (10000 x 18)/60 m = 3000 m.   Let length = 2x metres and breadth =3x metres.   Then, 2(2x + 3x) = 3000 or x = 300.   Length = 600 m and Breadth = 900m.   Area = (600 x 900) m2 = 540000 m   540000 m
<result>C</result>
The ratio between the length and the breadth of a rectangular park is 2 : 3 If a man cycling along the boundary of the park at the speed of 10 km/hr completes one round in 18 min, then the area of the park (in sq. m) is?