10) A circular park has four gates, one of each facing north, south, east, and west. A boy enters the park through the north gate and reaches the west gate by walking along the circular path of the park in a clockwise direction. The radius of the park is 100 m. What distance does the boy cover? (A) 151 m (B) 271 m (C) 351 m (o) 471 m Sharks have very highly developed senses that enable them to \"see\" in very dim light and pick up vibrations in the water. They are also very fast the blue shark has been measured at speeds of 64 km/h. 20) If a blue shark, swimming at its maximum speed heading east, is chasing a fish initially 165 m away from the shark, and the fish is swimming at 15 km/h east, how long will it take for the shark to catch .the fish? (A) 0.082 s (B) 3.4 s (C) 7.5 s (D) 12 s