Sophie drove from Junction A to Junction B (3 and 3/4) in 5 minutes.
Work out her average speed in MPH for this part of her journey.
Please show working out
thanks!
2007-05-11 09:30:13 · 5 answers · asked by amir_in_london 2 in Education & Reference ➔ Homework Help
3.75/5
= 0.75 miles per minute
0.75 x 60
= 45 miles per hour
2007-05-11 09:37:26 · answer #1 · answered by Anonymous · 0⤊ 0⤋
to figure this out you have to make a proportion
3 3/4 over 5 then find the irrational number for 3 3/4 which is 15/4 and turn it into a decimal which would be 3.75 then divide 5 by 3 3/4 and you get .75 as your answer
2007-05-11 16:39:40 · answer #2 · answered by me 2 · 0⤊ 0⤋
3 3/4 = 15/4 divide this by 5 so you will have 15/4 X 5/1= 75/4 div .4 into 75 and you get 18 and 3/4 mph.
2007-05-11 16:37:09 · answer #3 · answered by ruth4526 7 · 0⤊ 0⤋
3 3/4 mi divided by 1/12 hour = 45mph
2007-05-11 16:38:11 · answer #4 · answered by Mockingbird 2 · 0⤊ 0⤋
First find the average in miles per minute. Then convert that figure to miles per hour.
3.75 mi / 5 min = 0.75 mi/min
Now we convert the number of miles per minute to the number of miles per hour by multiplying 0.75 mi/min by the number of minutes in an hour:
0.75 (mi/min) x 60 (min / hr) = (0.75 x 60)(mi/min x min/hr)
The minute units cancel when we multiply them together above, and we are left with:
(0.75 x 60)(mi/hr) = 45 mi/hr.
2007-05-11 17:43:17 · answer #5 · answered by MathBioMajor 7 · 0⤊ 0⤋