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jovellabreu12
08.12.2020 •
Mathematics
Hina drives first 120 km in 2 hrs and next 180 km in next 4 hrs. What is her
average speed for the entire trip in km per hour?
step by step explanation plz
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Ответ:
Given ,
Distance travelled in first 2 hrs = 120 kmDistance travelled in next 4 hrs = 180 kmWe need to find
Average speedFirstly finding speed
• Speed in first 2 hrs = 120/2 = 60km/h
• Speed in next 4 hrs = 180/4 = 45 km/h
As we know that ,
Average speed = 2V₁V₂/V₁ + V₂Substituting known values we have ,
⇒ Average speed = 2 ( 60 ) ( 45 ) / 60 + 45
⇒ Average speed = 2(60)(45)/105
⇒ Average speed = 5400/105
⇒ Average speed = 51.42 km/h
Ответ:
No, small otherwise your question is wrong
=>4320/1000=4.32
=>(,)(.)4(.)32/4(,)32
Which is this?