1.设这个角为x
180-x+1=3(90-x)
x=44.5
2.设这个角为x
180-x=2(90-x)+10
x=10 180-x=170
3.设甲速度x,乙速度y
180(x-y)=400
40(x+y)=400
x=55/9 y=35/9