The average of 6, 15 and m is (6 + 15 + m) / 3
= (21 + m)/3 = 7 + m/3
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I am assuming that you mean 15 meters by 18 meters. 15:18 = 5:6
It is: 15 m divided by 6 = 2 m and 50 cm
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Average speed = (distance covered) divided by (time to cover the distance) = 30/5 = 6 meters per second.Equivalent to 21.6 km per hour.
Acceleration is measured in distance per unit timer per unit time, or in SI units this is usually m/s/s or m/s^2. If an object's velocity increases by 15 m/s in five seconds this is an average acceleration of: 15 m/s / 5 s = 3 m/s/s