Answer:
Step-by-step explanation:
the unit of length is meter,
so, 80cm=0.8cm, 10cm=0.1m
the length of the rail=
=
90+120 miles/1.5+3 hours = 210 miles/4.5 hours = 46.67
7/12
2 1/3 + 1 3/4
7/3 + 7/4
28-21/12
:)ur wel
22 degree represents the angle of elevation,x.