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A person travels by 45km/hr speed and reaches his destination. He comes back with a speed of 36km/hr.Find his avg speed

the average speed can be calculated by finding the arithmetic mean of the two speeds. that is, 40.5 km/hr is the required answer


45 + 36 / 2 
= 81/2 
81/2 is the required avg speed
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Average speed is sum of speed /2.
speed is 45 km/hr and 36 km/hr .
average speed is (45+36)/2=81/2=40.5km/hr
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