an aeroplane covers the four sides of rhombus field at speed of 200km/h,400km/h,600km/h and 800km/h.then the average speed of the plane in the entire journey is
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Answer:
let the length of field be x km
Total distance it flew = 4x km
total time taken = x/200 +x/400 + x/600 + x/800
LCM = 2400
Total time = 12x+6x+4x+3x /2400
= 25x/2400 hours
...
Average speed = total distance / total time
4x / (25x/2400)
Average speed = 4x*2400/25x
=4*96
= 384 km/h ...
rohangupta0424:
pls mark as the brainliest answer
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