Olly drove 56 km from Liverpool to Manchester. He then drove 61 km from Manchester to Sheffield.

Olly's average speed from Liverpool to Manchester was 70 km/h.

Olly took 75 minutes to drive from Manchester to Sheffield.

Work out Olly's average speed for his total drive from Liverpool to Sheffield.

Input note: give your answer correct to 1 decimal place.

give right answer brainiest! please help!

57.1 km/ h

Step-by-step explanation:

First find the amount of time it took for Olly to drive from Liverpool to Manchester.

Time = Distance / Speed

= 56 / 70

= 0.8 hours

It took 75 minutes to drive from Manchester to Sheffield. In hours that it:

= 75 / 60 minutes

= 1.25 hours

Total time taken to travel from Liverpool to Sheffield is therefore:

= 0.8 + 1.25

= 2.05 hours

Distance travelled from Liverpool to Sheffield:

= Distance from Liverpool to Manchester + Distance from Manchester to Sheffield

= 56 + 61

= 117 km

Average speed for the whole journey is therefore:

= Distance / Time

= 117 / 2.05

= 57.1 km/ h

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