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In the hare tortoise race, the hare run for 2 min at a speed of 7.5km/h, slept fo 36 min and again run for 2 min at a speed of 7.5 km/h. Find the average speed of the hare in the race. |
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Answer» The average speed of hare in RACE is 0.138 m/s or 0.4968 km/hr. Explanation: = 7.5 Km/hour = 7.5 x 1000/3600 = 2.08 m/s = distance = x t = 2.08 x 120 = 249.6 meter Duration of sleep = = 56 MIN Velocity during sleeping PERIOD = = 0 m/s Hence = 0 meter Now = 2 min, = 7.5 Km/h = 2.08 m/s = 2.08 x 120 = 249.6 meter TOTAL duration = = 60 min = 3600 seconds Total distance travelled = = 499.2 meter Hence Average speed of hare = Total distance / total duration = 499.2 / 3600 = 0.138 m/sec
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