Fao: Pixelchic

[Buenchico]

Hi

Your question about Bob's journey hasn't got an 'Answer' button in my browser!

The answer you require is 45 miles. (The journey times are 45 minutes and 36 minute respectively).

Chris

[Gizmonster]

I also noticed that there wasn't a "post an answer" button and was gonna make a separate post with the answer - but you beat me to it lol >.<

Anyway - if u need a proof Pixelchic (is it homework or something ??), then here it is:

Distance = velocity x time

So, in first case D = 60 x T

In second case, the distance is the same, the velocity is now 75 mph and the time is 9 minutes (3/20 hour) less.

i.e. D = 75 x (T - 3/20)
D = 75T - 11 1/4

Therefore 60T = 75T - 11 1/4

T = 3/4 hour (time taken for first journey) and D = 45 miles, as Buenchico correctly pointed out.