A truck travels 239 miles in 4.2 hours. What is his average speed?
A
1003.8 mi/hr
B
113.8 mi/hr
C
56.9 mi/hr
D
0.04 mi/hr

Question

A truck travels 239 miles in 4.2 hours. What is his average speed?
A
1003.8 mi/hr
B
113.8 mi/hr
C
56.9 mi/hr
D
0.04 mi/hr

r_josh10 · Answer

@dan815

r_josh10 · Answer

@paki

r_josh10 · Answer

@texaschic101

anonymous · Answer

wouldn't you multiply 239 * 4.2 to get the answer?

r_josh10 · Answer

I think the formula is S=D/T

mrnood · Answer

@RavenTeenTitans 
NO

you divide miles/hours to get mph

r_josh10 · Answer

is the formula right tho? @MrNood

anonymous · Answer

Oh right, the formula. I'm becoming more and more forgetful each day.

r_josh10 · Answer

np @RavenTeenTitans

r_josh10 · Answer

Is it C? Since S=D/T, S=239/4.2?

mrnood · Answer

well the formula IS

speed = distance/time

but this is usually written

v=s/t

using s for distance, t for time and v for velocity (or speed in this case)

xmissalycatx · Answer

You're going to divide the two numbers because your formula would be $$v=\frac{ s }{ t }$$ so it would look like.. $$v=\frac{ 239 }{ 4.2 }$$

r_josh10 · Answer

so is C right?

xmissalycatx · Answer

You're correct. :)

r_josh10 · Answer

Thanks! @xMissAlyCatx

mrnood · Answer

if you understand theconcept and are confident in your calculation the just go with it.

There is not always someone to confirm tyour work in 'real life'

xmissalycatx · Answer

You're welcome @r_josh10 

and @MrNood is right. If you really are confident in your answer then go with it. But we will be here to assist you if you need it! :)