An athlete covers a distance of 1200meters in 4 min 48 sec. Find his speed in 12.6km/hr
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An athlete covers a certain distance in 30 minutes at the uniform speed of 12 km/hr. By how much he must increase his speed so as to cover the same distance five minutes early?
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First, let us find the distance.
Distance = Speed × Time.
The speed is 12 km/hr and time is 30 minutes or 0.5 hours.
So, Distance = 12 *0.5 = 6 km.
To cover the distance 5 minutes early, he should cover this distance in 25 minutes or 5/12 hours.
Now, Speed = Distance ÷ Time.
So, Speed = 6 km ÷ (5/12) hours = 14.4 km/h.
Current speed is 12 km/h, and required speed is 14.4 km/h.
Therefore, he should increase his speed by 14.4–12 = 2.4 km/h.
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