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How much time (in minutes) will a dog take to run around a square field of side 75 m if it runs at the rate of 6 km/hr?1. 1.82. 3.63. 2.54. 3 |
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Answer» Correct Answer - Option 4 : 3 Given: Square of side = 75 m And a dog runs around the square with a speed of = 6 km/hr Formula Used: The perimeter of a square = 4 × side of the given square Calculation: ⇒ Speed of the dog in m/sec = 6 × 1000/3600 = 6× 5/18 = 5/3 m/sec ⇒ The perimeter of the Square = 4 × 75 m = 300 m ⇒ Time = Distance/speed Hence, Time is taken by the dog to travel around the square ⇒ Time = (300)/(5/3) = 60 × 3 seconds or (60 × 3)/60 = 3 minutes |
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