mathematicians

Wig

anyone care to work this out?

55mpg, 8 miles per hour

How many ml of petrol being used
per second?
per minute?

with the same rate of consumption (ml/min) what would be the mpg at 30mph?

w211

My workings out -

8 miles = 1 hour, 55 miles = 1 gallon,
1 gallon = 4.546 litres

55 miles = 4.546 litres
12.09 miles = 1 litre

8 miles = 0.6617litre/hour
8 miles = 661.7ml/hour

=11.02ml/minute
=0.183ml/second

w211

still trying to get my head round the second part of your question!

Wig

Thank you

So @ 30mph

11.02ml / minute
661.7ml / hour

30 miles = 661.7ml

4.546/0.6617= 6.87
30x6.87 = 206mpg

Wig

Now how to pin point at what speed it will equal 141mpg

getmore4less

I will leave some info for the reader

(hope I get his right)

1gallon=X1ml 1hr = X2minutes 1minutes= X3 seconds

(m/h)/(m/g) = g/h so ml/second = (g*X1)/(h * X3 *x3)


similar process to do the other calculation allthough there is a short cut.

55/8 = X/30 so X = 206.25mpg

Wig

getmore4less wrote: »

I will leave some info for the reader

(hope I get his right)

1gallon=X1ml 1hr = X2minutes 1minutes= X3 seconds

(m/h)/(m/g) = g/h so ml/second = (g*X1)/(h * X3 *x3)


similar process to do the other calculation allthough there is a short cut.

55/8 = X/30 so X = 206.25mpg

No idea what you did there, but same answer as me.

How about what speed = 141mpg?

getmore4less

55/8 = 141/y y = 20.51

getmore4less

Wig wrote: »

No idea what you did there, but same answer as me.

How about what speed = 141mpg?

see above,

There is no need to convert to ml or seconds