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lina2011 [118]
3 years ago
8

A motorcyclist drives from A to B with a uniform speed of 30 km/h and returns back with a speed of 20km/h-¹ find the average spe

ed ?
PLEASE DO IT AS FAST YOU CAN AND NO SCAM ANSWERS OR ELSE I WILL REPORT​
Physics
1 answer:
k0ka [10]3 years ago
6 0

Answer:

Average speed = 24 km/h

Explanation:

  • Let the distance be x.

<u>Given the following data;</u>

Uniform speed A = 30 km/h

Uniform speed B = 20 km/h

To find the average speed;

Mathematically, the average speed of an object is given by the formula;

Average \; speed = \frac {total \; distance}{total \; time} ..... equation 1

Total time = TA + TB

T_{A} = \frac {x}{30}

T_{B} = \frac {x}{20}

Total \; time = \frac {x}{30} + \frac {x}{20}

Total \; time = \frac {5x}{60}

Total distance = x + x

Total distance = 2x

Substituting the values into equation 1;

Average \; speed = \frac {2x}{\frac {5x}{60}}

Average \; speed = \frac {2x*60}{5x}

Average \; speed = \frac {120}{5}

<em>Average speed = 24 km/h</em>

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