Distance time speed help

I'm not sure what to do next


Posted from TSR Mobile

Refer to what the definition of "average speed" is and apply it.

Speed is distance times time


Posted from TSR Mobile

Okay but what is average speed??


Posted from TSR Mobile

Not sure :/


Posted from TSR Mobile

210 x 70 = time b to c
5- time = time from a to b
Time from a to b / 50 = distance
(210 + a to b distance ) / total time

Total distance over total time taken


Posted from TSR Mobile

Total distance over total time taken


Posted from TSR Mobile

Can you help me please


Posted from TSR Mobile

Sorry, was busy and missed the last notif.

So as I've mentioned, the average speed is given by $\displaystyle \text{average speed} = \frac{\text{total distance travelled}}{\text{total time taken}}$

For the journey from Appleton (A) to Cantham (C), you are told that the total time is 5 hours therefore you just need to know the distance from A to C.

Your are told that from Brockley (B) to C the car travels at 70mph and the distance is 210, therefore, how long does the journey take to go from B to C??

Once you find this time $t$, subtract it from 5 hours and the result (which is $5-t$) will be the time taken to go from A to B. You that the speed from A to B is 50mph, therefore what is the distance?? Call this distance $d$

Then the total distance would be A to B (which we call $d$) add on the distance from B to C (which is 210).

Then just go back to the average speed formula and calculate it.

Wait may I know where you got the 5 hours from?


Posted from TSR Mobile

5 hours is the time taken from A to C (says in the question).

I explained above I'm doing 2 questions at a time that's why!


Posted from TSR Mobile

Ah, no worries :-)