Answer:
360 mph option (c)
Step-by-step explanation
To find the total distance add all the distance i.e,
Total distance = 60+180+540+660
=1440 km
similarly, total time taken =10+3+90+110
=240 minute
To convert 240 minute into hour , divide 240 minute by 60
=[tex]\frac{240}{60}[/tex]
=4 hour
Speed of the plane =[tex]\frac{Total Distance}{Total Time}[/tex]
Speed of the plane =[tex]\frac{1440}{4}[/tex]
=360 kmph
Hence , the correct answer is 360 kmph
