Mountains 57433

The trip to the seaside vacation was as follows:
80% of the entire route was on the plain.
40% of the rest was through the mountains.
The remaining 180 km was along the coast.
What is the total length of the route? Thank you

Correct answer:

x =  1500 km

Step-by-step explanation:

p1=80%=10080=54=0.8 p2=40%=10040=52=0.4  p3=(1p1) p2=(10.8) 0.4=252=0.08  p1 x+p3 x+180=x 0.8 x+0.08 x+180=x  0.12x=180  x=0.12180=1500  x=1500=1500 km

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