The length to width ratio of a rectangular park is 3:2. If a guy cycling along the park's perimeter at a pace of 12 km/hr completes one circuit in 8 minutes, the park's area (in square metres) is:
A. 15360
B. 153600
C. 30720
D. 307200
Answer:B
The length to width ratio of a rectangular park is 3:2. If a guy cycling along the park's perimeter at a pace of 12 km/hr completes one circuit in 8 minutes, the park's area (in square metres) is:
A. 15360 B. 153600 C. 30720 D. 307200
Explanation: Perimeter = Distance travelled in eight minutes = 12000/60 x eight metres = 1600 metres.Let's say the length is 3x metres and the width is 2x metres.2(3x + 2x) = 1600 or x = 160, respectively.The length is 480 metres and the width is 320 metres.Area = 153600 m2 (480 x 320) m2.