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A car travels 180 km from A to B at 60 kph, and returns from B to A along the same route at 90 kph.  What is the average speed of the round trip?

 Jun 8, 2020
 #1
avatar+131 
+5

A-----------------------B

0 ---------------------- 180

 

The trip from A to B took him 3 hrs

 

The trip from B to A took 2hrs.

 

\(\frac52\) = 2.5

 Jun 9, 2020
 #2
avatar+26620 
+1

Well we know from Guest that total time was 5 hours

   total distance was 180 + 180 = 360 km

 

Avg speed =   360km/5hr = .........    km/hr

 Jun 9, 2020

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