Try to do them on math -way
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
Answer:
See Explanation
Step-by-step explanation:
Look into this site called
math-papa It is a really helpful calculator with a capability of basically anything math related (see screen shot)
Answer:
D
Step-by-step explanation:
I am sorry but I can not give you how I got thinms answer but i do know tgat the answer is correct