The railway

The railway line has a gradient of 12 per mille. How many meters will it ascend to a horizontal distance of 4 km?

Correct answer:

y =  48 m

Step-by-step explanation:

x=4 km m=4 1000  m=4000 m q=12=100012=0.012  y=q x=0.012 4000=48 m

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