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The tracks are straight and flat so when you put then going up a hill, they need to be bent. They have to dig out of the hill to place the tracks into it. It takes a lot more work to do something as simple as laying tracks.
radio transmission can be heard in hilly areas because of diffraction
Depending on how hilly, a 4-wheel drive is the best transportation for hilly areas. Of course, for small hills, any transportation will work.
at hilly areas and coastal areas
"Those people are lucky who can afford to go in the hilly areas" "Nature is at her best in the hilly areas"
you hear the radio but not see the tv in hilly areas bcz of diffraction Read more:Why_can_you_hear_the_radio_but_not_see_the_tv_in_hilly_areas
to hilly areas that is the place
narrow gauge
dales
the 12 gauge
Not exactly, but cooking is faster in higher altitudes. Hilly areas do mean higher altitute, so if this hilly area happens to be of several hundred feet or higher from sea level, then it is most likely true.
Hilly and mountainous areas.