ILL MARK BRAINIEST IF YOU DO ONLY NUMBER 8 DO NOT DO 7!!!!
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Answer:
Step-by-step explanation:
<u><em>Given: </em></u>
Distance = S = 18 km
Time = t = 20 min = 20/60 = 0.33 hours
<u><em>Required:</em></u>
Average Speed = <v> = ?
<em><u>Formula:</u></em>
Average Speed = Total Distance Covered / Total Time Taken
<u><em>Solution:</em></u>
A . S = 18 / 0.33
A.S = 54 km/hr